keuwlsoft Apps

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Function Generator 1.2
keuwlsoft
Dual channel function / waveform / signal generator for the speaker/ headphone audio output.No Ads, No Permissions, No In AppPurchasing, No Limited Features. Full Version.Output is 16 bit foreach left and right channels and at 44.1kHz. Output will depend onyour device hardware. Some device hardware may may filter out theDC bias and low frequency signals. At high frequencies, thewaveforms will be distorted due to limited number of samples foreach waveform (for example at 4.41kHz, a sine waveform will beapproximated by only 10 points). Therefore this is forfun/educational use, for critical applications use a realcalibrated function generator.Left and Right audio channels can beassigned to either channel 1 or channel 2.Sine, Square &Triangular waveforms.Frequency range from 1 mHz up to 22kHz.Amplitude as percentage 0-100%.Set duty for square waveforms orskew triangular waveforms to get saw waveforms.Offset the phase ofwaveforms.Sweep frequency or amplitude (Single, Repeat & Bouncemodes).Amplitude Modulation (AM).Frequency Modulation (FM).Burstmode for a specific number of waveforms (1-10000).White noise &pink noise Generator. Pink (1/f) noise falls of at ~3dB per octavebetween 43 Hz and 44 kHz. Memory slots to save & recall channelconfiguration.Select values with spring slider or number pad.Moredetailed explanation available on website
Guitar Tuner 1.41
keuwlsoft
Straightforward guitar tuner. Single screen app that starts in autotune mode. Simply run the app, hit a string and start tuning yourguitar. Tune into the orange region for a good results or green forperfection.This app uses your microphone to detect the string beingplayed and indicate if you should tune up or down. Pitch pipefunction also included. The standard EADGBE guitar (not implementedfor very small screen devices) indicates current note being playedor allows fast note selection in manual mode. Tuning range from 30Hz (B0) to 4186Hz (C8), so can also be used to tune other stringedinstruments.
SPL Meter 1.03
keuwlsoft
Sound Pressure Level Meter. This app uses the microphone to detectsound and convert it into an SPL value. FOR INDICATION ONLY.Results depend on your device and its hardware. The range betweenthe noise floor and saturation may be only 20 dB on the worstdevices, but could exceed 100 dB on the best devices. Features ofthis SPL meter include: Analogue Dial with Max and Minindicators.Weighting – A, C or None . (A weighting filters the highand low frequencies according to how the ear perceives soundloudness). Results are in dB, dBA or dBC depending onweighting.Averaging of SPL, Clear and Pause buttons.Octaves andthird octaves - Frequency spectrum of the sound.Graph – Shows thetime depedence of the sound.Autoscale or manual (pinch & pan)Y-Axis.Relative button – if looking for differences, tapping RELwill remove the current averaged value from the reading.Calibrateoption – If you have a calibrated SPL meter or known loudnesssource, you can use this option to calibrate the meter. (Howeverits still for Indication Only).More technical details can be foundon the website.
Audio Frequency Counter 1.03
keuwlsoft
Frequency counter based on the microphone input. Counts when theinput rises or falls past a set level and converts into intofrequency or a time period. FOR INDICATION ONLY. Results depend onyour device and its hardware. If you just want to know thefrequency of a sound with harmonics (e.g. mucial instrument), a FFTbased app such as keuwlsofts spectrum analyser or guitar tuner(both free) will be better. This app can provide more accuratefrequency measurement for single frequency input signals. Featuresinclude:Display of triggered event count and frequency or timeperiod.Graph of input signal, 2.5 ms/div up to 640 ms/div.Gate timeof 0.1s, 1s, 10s or 100s.Gain from x1 to x1000.Trigger on rise orfall.AC or DC coupling.Set a noise level so new event is nottriggered until the signal has first passed this level.More detailscan be found on the website.
Sand Timer 1.3
keuwlsoft
Hourglass timer with great graphics, no ads & nopermissions.Great for board games, as a kitchen timer, or fortelling the kids how long until bedtime.Operate up to 8 sand timerssimultaneously (each one is colored differently and selected atleft of screen).Accelerometer used - turning upside down willreverse the time and reset the timer (option to turn this off).Setthe countdown time anywhere from 1 second up to 83 days. Changetimer names. Changes will be stored for next time app isrun.Notifications will be shown if the timer finishes when the appis not open.
USB Host Test 1.1
keuwlsoft
Tests your device USB Host capability by listing the USB devicesattached.Simply run the app, plug in your USB device(s) and clickfind.Copy results to clipboard ready for pasting into othersoftware.Not all devices have USB Host capability. For USB devicesto be detected we need:Android 3.1 or newer (USB Host APIsupport)Device that has USB hardware.Compatible Kernel that linksthe hardware to the API. (Rooting or changing kernel can oftensolve USB connectivity issues, but only attempt if you know whatyou're doing).USB OTG connection.Sufficient power on the USB bus.If USB devices are detected, details reported include:Device SerialNumberVendor IDProduct IDManufacturer String DescriptorProductString DescriptorClass, Subclass and ProtocolUSB VersionMaxPowerNumber of ConfigurationsNumber of InterfacesInterface andEndpoint InfoNote the amount of info shown will depend on the USBdevice and the amount of access allowed.
Gauss Meter 1.02
keuwlsoft
This app uses the magnetic field sensor on your device to measuremagnetic flux density (B) in Gauss or Tesla. FOR INDICATION ONLY.Results depend on your device and its hardware. Your device musthave a Magnetic Field Sensor for this app to function. Featuresinclude: Analogue dial to show current reading.Averaging.Maximumand minimum values.Gauss or Tesla units.4 time constant options. 3Refresh speeds.Graph – Shows the time depedence of the magneticfield.Compass Ferrous metal detector – sound frequency will changewith gauss level.Autoscale or manual (pinch & pan)Y-Axis.Calibrate option – If you have a calibrated gauss meter orknown magnetic source, you can use this option to calibrate themeter. (However app is still for Indication Only).More details canbe found on the website.
Pulse Echo Sonar Meter 1.01
keuwlsoft
Uses the audio autput to generate sound pulses and then detects theecho on the microphone. The echo signal can be visulised in a map,Fourier transformed or just as the time-series waveform. Great forinvestigating/demonstrating acoustics principles. Free & NoAds.RECORD_AUDIO Permission to use microphone to detect the echo.WRITE_EXTERNAL_STORAGE Permission is so that data can besaved.Features/Specifications:• Sampling frequency 44.1 kHz.•Sampling duration 0.001 s to 5 s.• Single / Continuous modes.• SaveData in CSV files.• Pulse Generation: • Single/Train/Chirp. •Square/Sine waveforms. • Tukey/Hanning Envelopes. • Pulse frequency20 Hz to 22.05 kHz. • Pulse duration up to 1 s.• MAP – Visualisethe echo. Colour or Black and White. Pixel value from RMS orabsolute value. New line for each echo trace. Move device whilstpulse-echoing to generate a map.• Fast Fourier Transform (FFT) of8192 data points to determine frequency content between echo detectlines.• Peak frequency detection• FFT AveragingFor Indication Only.Use Ear Protection if required. Due to the limits of the typicalmicrophone dB range on most devices, distant echo signal are likelyto be too weak to detect clearly unless extra amplification or astrong echo is present.For fun/educational/research use. This isnot ultrasound and NOT suitable for any medical imaging. This appcan create annoying loud sounds, so use ear protection if required.
Harmonicity Meter 1.11
keuwlsoft
Measure the Harmonic to Noise Ratio (Harmonicity) from yourmicrophone.Harmonicity is a measure of the sound energy in theharmonics relative to the rest of the spectrum. Harmocity varieswith age, gender & which vowel you pronounce. Higherharmonicity values indicate a purer sound. Whilst lower jitter andshimmer values indicate a purer sound.This meter is supposed to beused with a continuous consistent sound, e.g. Pronoucing a vowel,or a tone from a speaker/instrument. Rapidly changing tone/soundwill give nonsensical output. FOR INDICATION ONLY. Harmonicity willvary depending on how close the source is to the microphone.Microphone sensitivity varies with frequency and from device todevice. Even amoungst scientific literature, it is difficult tofind consistency in absolute reported values. Jitter is a measureof the frequency variation of the sound. The relative jitter isshown as a %.Shimmer is a measure of the amplitude variation of thesound. The relative shimmer is shown as a %.Autodetects sound – Appwill only start measuring when a sound is detected.Averaging -After 0.7s, the app will start averaging the Harmonicity, Jitter,Shimmer and freqency values. This will continue until the sound isstopped at which point the last 0.7s of data is removed from theaveraged values.Musical Note – The current detected frequency isconverted into a note based on western 12 tone equal temperament.Use to tune your guitar or other instrument if you wish.Pausebutton – Useful if in a noisy environment and measurement doesn'tauto stop.FFT Spectrum – Autoscaling Sound Intensity between 0 and2 kHz.Range: 100 Hz to 2 kHz fundamental harmonic frequencydetection.Internet Permission is for link to website with moreinfo/user guide for app.Technical bit:The fast fourier transform(size 8192) is performed on the last 0.74s of data to produce afrequency spectrum (0 to 5.5 kHz with 1.35Hz resolution). Thisfrequency spectrum is windowed between 100 and 4 kHz with linearfall offs to zero at 50 and 5 kHz. The fundamental frequency isdetermined from polynomial fitting to peaks. The harmonic energy isdetermined from the sum of the FFT signal at the harmonicfreuquency plus 8 Hz either side. The noise is the sum of the restof the FFT. The ratio of harmonic to noise energy is the Harmoicityand is displayed in decibels.More technical details can be found onthe website.
Metronome 1.1
keuwlsoft
Metronome with no ads & no permissions. ♩ Beats per Minute(BPM) from 10 up to 310 in 0.1 BPM intervals. ♩ Moving pendulumwith motion blur effects. ♩ Accelerando slider for gradual speedingup/slowing down. (0.1 to 10 BPM/bar)♩ Beats highlighted on musicalstaff as they are played. Accent or mute any of the beats bytapping above/below note.♩ Select up to 12 Beats per bar. Set beatvalue to half note, quarter, eighth or sixteenth. ♩ Three differentsound effects to choose from. ♩ Select from 0 to 9 sub beatdivisions.
Spirit Level 2.01
keuwlsoft
Spirit Level. No Permissions Required. Free & No Ads. • Bullseye level with roll & pitch gauges screen• Horizontal andvertical bubble level and angle gauge screen. • Calibration featureto correct for accelerometer misalignment & different axissensitivities.For best results touch CAL and calibrate first. TheSpirit Level is only as good as your accelerometer. For indicationonly. Don't damage your tablet or phone, use a real spirit levelwhen appropriate.• Pause button to hold the current reading. • Zeroand reset button to make measuring angles easier. • Option to autoselect screen based on inclination.That's it. Enjoy.
Light Meter 1.2
keuwlsoft
This app uses the light sensor to measure illuminance in lumens persquare meter (lx) or lumens per square foot (foot candles). FORINDICATION ONLY. Results depend on your device and its hardware(Not every device has a light sensor and quality of the sensorsvaries massively). Features include:Analogue dial to show currentreading.Averaging.Maximum and minimum values.lx or ft-c units.4time constant options. 3 Refresh speeds.Graph – Shows the timedepedence of the light.Autoscale or manual (pinch & pan)Y-Axis.Calibrate option – If you have a calibrated light meter orknown light source, you can use this option to calibrate the meter.(However app is still for Indication Only).More details can befound on the website.
Bluetooth Electronics 1.2
keuwlsoft
Control your electronic project with an Android device. This appcommunicates using Bluetooth to an HC-06 or HC-05 Bluetooth modulein your project. This app comes with a library containing 10Bluetooth examples for Arduino. It can also be used with RaspberryPi or any other rapid prototyping system in which you have includeda suitable Bluetooth module to your project. Ideal for learningelectronics in a fun way. Ideal for rapid prototyping a new idea.Ideal for exhibiting your project. Some electronics skillsrequired. Requires an Android device with Bluetooth capabilityenabled. Version 1.1 only works with Bluetooth Classic. Version 1.2(currently being rolled out - as of May 2018) supports BluetoothLow Energy and USB connectivity in addition to Bluetooth Classic.Large selection of controls available including buttons, switches,sliders, pads, lights, gauges, terminals, accelerometers andgraphs. Drag and drop them onto the panel grid. Then edit theirproperties. 20 customisable panels available. Import/Export panels.Discover, Pair and connect to Bluetooth devices. Then click Run touse the panel. Library of 10 Arduino Examples to get you started:LED Brightness - PWM with a Slider control RC Car demo – BasicButton controls Persistence of Vision – Text control Repeater Demo– Send and Receive Terminals Ultrasonic Distance Sensor - LightIndicator MEGA Monitor – Graphs UNO Monitor – More graphsTemperature and Humidity – Temperature Gauge Configure HC-06 Demo –In-case you want to change Baud rate Motor Control Demo –Accelerometer and pad controls Finally, You undertake anyelectronic project at your own risk. Please be careful. Considerwhat is going to happen to your project if the Bluetooth connectionis lost, or the Android device crashes.
Compass 1.01
keuwlsoft
Uses the Magnetic Field Sensor to convert your device into aCompass. Does not need to be level. Magnetic North and True NorthNeedles. Free & No Ads.Location is required to determine themagnetic declination - the difference between magnetic north andtrue north (Hence the ACCESS_FINE_LOCATION Permission). IfGPS/Network location is not available or turned off, then thelocation can still be entered manually.Normally a compass needs tobe level to get the correct reading, but this app uses theaccelerometer reading to convert the magnetic field reading back tothe horizontal plane. If you would prefer it to act like a realcompass (which requires being level for a correct reading), inSettings > Mag North, select the magnetic north to point to themaximum field in the plane of the device.Also:• Bull's eye Bubblein Compass to show how level it is.• Roll and Pitch Gauges.•Calibrate Bubble Level Option.• Heading in Azimuth or QuadrantNotation.• Magnetic Field Strength and Inclination.• Rotatable dialwith orienting lines.• GPS/Network Location – Latitude, Longitudeand Elevation (GPS can consume a lot of battery, therefore it isonly measured continually when the location display is shown.Otherwise just one reading is taken from which the magneticdeclination is determined).Your device must have a Magnetic FieldSensor for this app to work. Magnetic field direction can beaffected by nearby ferromagnetic material - Therefore move into aclear area and remove any metallic casing that might interfere withthe sensor. Some sensors can become magnetized or gain an offsetresulting in false readings – rotating the device around each ofthe three axis can sometimes help. Results depend on quality ofmagnetic sensor, so use for indication only.
Accelerometer Meter 1.32
keuwlsoft
View or log output from your accelerometer sensor. The app has sixscreens to choose from:Meter This show the output from theaccelerometer and minimum and maximum vales recorded.GraphPlots theaccelerometer output over time. Option to save data. SpectrumShowsthe frequency spectrum of the recent accelerometer data. Use tofind resonant frequency's.LightConverts the accelerometer sensoroutput into a colour. Wave the device around and the colour willchange.MusicThis is a musical instrument based on the accelerometersensor. Orientation selects the note and pitch the volume. It isbased on a 5 equal temperament notes per octave scale so that themusic will still sound reasonable even if played badly.InfoThisscreen provides info on your sensor, such as vendor, version,resolution and range. It also shows info for other sensors on yourdevice.Free & No Ads. No time limits, no restricted featuresetc, this is the full version.Write external storage permission sothat you can save the data in graph or spectrum modes.
Keuwl Guitar Tuner 1.11
keuwlsoft
Keuwl Guitar Tuner uses the microphone to auto detect the pitch ofthe note being played. The 3 dials will rotate to show the notebeing played. The middle dial shows the pitch or note name. Theinner dial shows the octave. The outer dial will show if the noteis flat or sharp - The orange region is within 10 cents for goodtuning, the green is within 5 cents for more accurate tuning.KeuwlGuitar Tuner is free. No ads. No trial version. No time limits. Norestricted features. The only permission is for microphone access.This is the full version!Whilst optimised as a guitar tuner, thisapp can be used for tuning many other musical instruments.Frequency detection from B0 (30 Hz) up to C8 (4186 Hz).In additionto 12 Tone Equal Temperament(12-TET), choose from just intonation,Pythagorean, 5-limit, 7-limit, quarter comma meantone and N-Toneequal temperament tuning. For N-Tone ET, N can range from 5 to52.Shift feature for those that don’t want A to be 440 Hz or if youneed to tune to accompany your out of tune friends. Get them toplay a note, hit the shift key, and rotate the dial to what theythought they played. Hit the shift key again and then tune asnormal. Remember to hit reset to get back to original settings atany time.Pitch Pipe also included.
GPS Waypoint Finder 1.00
keuwlsoft
Uses the GPS sensor, Magnetic Field Sensor and Accelerometer todetermine the distance and direction to a GPS waypoint. Does notneed to be held level. Free & No Ads.Normally a compass needsto be level to get the correct reading, but this app uses theaccelerometer reading to convert the magnetic field reading back tothe horizontal plane.In addition to the direction and distance tothe waypoint, a compass ring shows the current heading. Northpoints to True North (i.e. The direction is corrected for themagnetic declination - the difference between magnetic north andtrue north).The GPS reading and the time since that reading isshown at the bottom of the screen. Use for geocaching, finding yourcar, hotel, or other locations.• Store up to 500 waypoints.•Imperial or Metric units.• Import and Export waypoints as GPXfiles.Arrow colour changes to green at less than 30m and blue atless than 10m to make it easier for littler ones to identify thatthey've reached the waypoint.Whilst walking, look where your going,not at the app or you might trip! The app tells you the directionof your destination, not how to get there. Only as good as thesensors in your device. Use for Indication Only.
Spectrum Analyser 1.31
keuwlsoft
Free audio spectrum analyser for your microphone.No ads. Fullversion.64 up to 8192 frequency divisions (128 to 16384 FFTsize).22 kHz spectrum range (can reduce down to 1 kHz for higherresolution).FFT Windowing (Bartlett, Blackman, Flat Top, Hanning,Hamming, Tukey, Welch, or none)Auto-scale or pinch to zoom, drag topan.Linear or logarithmic scales.Peak frequency detection(polynomial fit).Averaging, Min and Max.Save CSV data files (usesWrite External Storage Permission).Free or snap to peakcursor.Octave Bands - Full, half, third, sixth, ninth or twelfthbands.Weighting – A, C or None (A weighting filters the high andlow frequencies according to how the ear perceives soundloudness).Musical note indicator (green if within 5 cents, orangeif within 10 cents).Auto-scaling microphone input trace. For bestresponse on slower devices, keep the FFT size low.More detailedexplanation available on website
Wifi Analyser 1.10
keuwlsoft
Monitor strength of nearby wifi networks. Use to find a goodlocation for your wifi hub. Or use to identify a channel withlittle overlap with neighbouring networks.App has 4 screens:• Gauge– shows the signal strength of the currently connected wifinetwork. Also shows maximum, minimum and average values. Graph withauto-scale & speed options.• Channel – shows how the wifinetworks are spread across the channels and overlap each other. •Graph – shows how the signal strength of all nearby networks varywith time. Auto-scale & speed options. Select which networks todisplay.• List – Contains basic information for all the detectednetworks: name, mac address, frequency, channel, encryption typeand signal strength. For indication only. Ads shown on exiting apponly. If you dislike these ads, there is an option to turn them off(enabled after 6 hours) in the settings menu (top left button).
Car Challenge 1.00
keuwlsoft
Guide your car to the end of each track without crashing. Goodtiming and memory are required to complete each level. • 25 tracks•5 Different Cars• Designed to be played in the hard difficultysetting (no crashing allowed), however easy and medium difficulty(cars can take some damage) are also available. No Ads & NoPermissions.
Ruler 1.02
keuwlsoft
A simple, but very handy on screen ruler. No Permissions, Free& No Ads.Automatically sizes to most screens. However, checkscaling with a normal ruler on first use. If it is not correct,touch CAL and stretch the ruler to the correct size.• Centimetersand inches.• Measure length between two markers.• Copy toclipboard.
Protractor 1.02
keuwlsoft
Protractor for measuring Angles. Free & No Ads.• Camera viewwith Pause button.• Measure angle between two markers.• Horizontaland vertical plumb lines (Tap to snap nearest marker to line,double tap to track, tap again to release).• CAL button tocalibrate Accelerometer if plumb lines are out. • Copy angle indegrees and radians to clipboard.
Stopwatch
keuwlsoft
Stopwatch with great graphics, no ads & no permissions. Operateup to 8 stopwatches simultaneously (each one is coloureddifferently and selected at top of screen). Log up to 100 Lap orSplit times for each stopwatch. Pressing Split before startingstopwatch will change to Lap mode & visa versa. Stopwatchsettings and times are stored for the next time the app is run, soit will appear that the stopwatch has been running continuouslyin-between.
Geo Protractor 1.01
keuwlsoft
Measure angles between two points on the geo sphere with the cameraand augmented reality. Free & No Ads.Device orientation isobtained with the accelerometer and gyroscope, or with theaccelerometer and magnetic field sensor. Each method has advantagesand disadvantages and can be selected with the gyro or magnetbuttons (only if your device has the necessary sensors detected).Asphere with azimuth and angle of elevation lines is shownoverlaying the camera view. Two positions can be set puttingmarkers onto the view. The angle required to rotate from one to theother is shown, as is the difference in azimuth and angle ofelevation between the two points.For Indication Only. Note that ingyroscope mode, the azimuth will drift slowly. In magnetic mode,the Earths magnetic field can be distorted by nearby metallicobjects and give incorrect azimuth readings. For Indication Only.
LED Banner Scroller 1.01
keuwlsoft
Display scrolling messages. Send encouragement, display notices,get peoples attention, and more with this led banner scroller.Includes an experimental multi screen option for displaying themessage over multiple screens. Features:• Up to 6 lines of text.•Portrait or Landscape banner.• Mirror option for when banner is tobe viewed through a mirror.• Left, right, up, down or static scrolloptions.• Vary scroll speed.• Choose text & background colors.•Alter LED grid size.• Auto or manual size text.• Left, center orright text justification options.• 20 Memory slots to storemessages.• Create messages in any language.• Multi Screen (usesRECORD_AUDIO permission & might not work on all devices). Usesaudio communication to transfer scroll info to nearby devices tocreate a longer scroll comprising multiple screens. Set one deviceas the Master, and the others as Minions. Hold the speaker near themicrophone of the receiving device(s) for best results.Free &No Ads. Enjoy.
Flashlight 1.11
keuwlsoft
Flashlight (aka Torch), Free, No Ads. Just a great app with somecool features....Torch Mode – Turn the camera LED on and off. If noCamera LED is detected, the torch option is not available. (usesFLASHLIGHT & CAMERA Permissions).Screen Mode - Use the displayas a light - Swipe up/down to change color, left/right forbrightness or diagonally for color/grey.Music Mode – Lights andgraphics that move in response to sound detected on the microphone.(uses RECORD_AUDIO permission).Accelerometer Mode – Color willchange with orientation of device. Wave about at a music festivalfor a cool effect.Hazard Mode – In trouble, or just want some coolflashing lights. Change speed, color and blink pattern.Widget -(Navigate to widgets, hold on icon for 4s & place on homescreen). Widget turns LED on and Off (or loads the app if there isno LED).Please Note:1) Flashing lights can cause epileptic fits insome people, so use flashing features with caution. 2) These lightsdo not have reflective properties - car/bike lights are acombination of reflector and light – therefore use a proper lightdesigned for its application when possible.3) Don't shine thebright torch in eyes - it hurts.Enjoy!
Keuwl Music Pad 1.3
keuwlsoft
What if there was more than 12 notes in an octave? or less? Createnew instruments with up to 53 equal tempered notes per octave andexplore the sounds of such instruments with this app. This musicpad also allows you to slide up and down the particle beams tocreate cool sounds by increasing the pitch smoothly betwen octaveswithout changing the note. These features combined enable you tocreate new unique sounds that cant easily be replicated on otherinstruments.Notes range from C1 to C8 (play across 7 octaves).Shownote ratio (2:3 perfect fifth, 3:4 perfect fourth etc.) option foreasy playing in harmony. Snap to octave option for precise noteselection.Four different sounds.Free, No Ads, Full version.
Multi Piano 1.2
keuwlsoft
Play up to 4 pianos simultaneously on one device. Choose one of 8arrangements to suit your needs, whether playing alone or withfriends. Notes played are highlighted on the other pianos to maketeaching a new tune easy. Slide the bar below the piano to accesshigher or lower pitch notes. Features: Multitouch 8 Pianoarrangements with up to 4 pianos to choose from. Adjustable pianokey width. Highlights note played on other pianos to make teachingeasy. Pianos keys range from C1 to C8. No Ads & Free. (Notethat C1 to C3 will be quiet on most device onboard speakers, playthrough headphones or a sound system for better sound quality)
Calculator 1.01
keuwlsoft
Basic calculator with 9 digits (+2 more for the x10 exponent).Looksand acts much like a real hand held calculator.Ads only shown onexiting app.• Add things.• Subtract things.• ….• Square Root,Reciprocal and Percent Buttons.• Memory Buttons.• Enter numbers aslarge as 9.99999999E+99 or as small as 1.00000000E-99.• Settings toturn vibrate & sound off and on.• Short user guide in app foundby pressing the i button at the top right.
Counter 1.0
keuwlsoft
Counter, • Click and count upto 8 things simultaneously. • Counterpreferences and values stored for next time app is run.• 3 modes tochose from: single/multiple/list.• Nice graphics.• Renamecounters.• Copy to clipboard.• Different count sounds to chosefrom.
Guitar Tuner Pro+ 1.01
keuwlsoft
This app uses your microphone to auto detect the string beingplayed and indicate if you should tune up or down. Tune into theorange region for a good results or green for perfection.A Guitarimage shows the current note being played or allows fast noteselection in manual mode. Guitar tuning doesn't have to be EADGBE,Tap the tuning text box and then select from over 100 alternativetunings. Alternatively use the arrows to make your own tuning. Notethat you will need to change strings on your guitar for some of thetunings to avoid over tensioning them.Shift function for or thosethat don’t want A to be 440 Hz (e.g. orchestral tuning). Snapfeature to quickly shift to the nearest detected note.EqualTemperament (ET) / Just Intonation (JI) Tuning . Pitch pipefunction.Frequency detection from 30 Hz up to 4186 Hz (unshifted B0to C8). Whilst optimised as a guitar tuner, this app can be usefulfor tuning many other musical instruments.
Clap Counter 1.01
keuwlsoft
Count claps or other sound events with this app. When themicrophone sound level passes the clap detection threshold, thecounter value is increased by one. Graph to show sound level andwhen counts occur.Adjust measurement speed to one of 10 frequenciesbetween 0.5 Hz and 450 Hz.Reduce double counts with trigger resetsettingsFor indication only.
Egg Timer 1.0
keuwlsoft
Egg Timer for use in the kitchen or elsewhere. Time your eggboiling to get them how you like them.Control the egg timer byrotating the top half of the egg, or alternatively select timesusing the digital time indicator below the egg.Five egg timers,each adjustable up to 23 hours 59 minutes. Use the small egg iconsto change between them.Tap on the timer names to edit them.Vibrate,sound and other options found in the settings menu. Includesoptions for short alarm at 30 seconds remaining and countdown beepsfrom 5 seconds.
Accelerometer Counter 1.10
keuwlsoft
Count accelerometer events with this app by shaking or rotatingyour device. The accelerometer sensor is continually monitored andwhen the detection level is crossed, the counter is increased byone. • Detect the acceleration in either of the X,Y Z axis, themagnitude of the acceleration, or the angles about the device's Zaxis or XY plane. • Detect on rising or falling past the detectionlevel.• AC or DC coupling option.• Adjust measurement speed to oneof 12 frequencies between 0.5 Hz and 2 kHz.• Reduce double countswith optional no-count wait after detection.• Graph to showaccelerometer input in Cartesian and/or spherical coordinates.•Counts indicated on graph and with optional 'click'sound.Accelerometer sensors will vary in sampling speed, resolutionand accuracy from one device to the next. For indication only.
Base Converter 1.00
keuwlsoft
Convert integers from one base to another. Binary, Octal, Decimal,Hexadecimal, or any base between 2 and 62. Numbers up to 256characters in length. (Not limited by 32 or 64 bit integers, canhandle 256 bit integers in binary, or larger in the otherbases).Either of the two displays can be selected and edited, withthe conversion for the other display done automatically as one ischanged.
Proximity Sensor Counter 1.00
keuwlsoft
The proximity sensor in your device is continually monitored andwhen the detection level is crossed, the counter is increased byone. The proximity sensor is generally used to detect when thephone is placed to the head in answering calls. The proximitysensor is typically located near the speaker at the top of thephone. The proximity sensor usually comprises an Infrared (IR)transmitter and receiver. The sensor returns values in cmcorresponding to the distance to the nearby object. Most sensorswill only report a near or far value corresponding to zero or themaximum range, which varies from device to device. Regardless ofwhether the in-between values are reported, the sensor can be usedas a counter, incrementing each time something passes in front ofthe sensor.Whilst this app can be used for counting, it can also beused just to understand the sensing capability of the proximitysensor in your device.• Detect on rising or falling past thedetection level.• Reduce double counts with optional no-count waitafter detection.• Graph and gauge to show proximity distancevalues.• Counts indicated on graph and with optional 'click'sound.Proximity sensors will vary in sampling speed, resolution andaccuracy from one device to the next. For indication only.
Magnetic Field Counter 1.02
keuwlsoft
The magnetic field sensor in your device is continually monitoredand when the detection level is crossed, the counter is increasedby one. • Detect from the magnetic field in either of the X, Y, Zdirections, or from the magnitude of the magnetic field, |B|.•Detect on rising or falling past the detection level.• AC or DCcoupling option.• Adjust measurement speed to one of 12 frequenciesbetween 0.5 Hz and 2 kHz.• Reduce double counts with optionalno-count wait after detection.• Graph to show magnetic fieldvalues.• Counts indicated on graph and with optional 'click'sound.Magnetic field sensors will vary in sampling speed,resolution and accuracy from one device to the next. For indicationonly.Don't put a strong magnet too close to your device – you riskdamaging the sensor/device. However, waving your device around inall three axis should restore the magnetic field sensor to goodworking order.
Gyroscope Counter 1.01
keuwlsoft
The gyroscope sensor in your device is continually monitored andwhen the detection level is crossed, the counter is increased byone. • Gyroscope measures the rate of rotation about the devicesX,Y and Z directions. Detect counts from either of of the axis orfrom the magnitude.• Adjust measurement speed to one of 12frequencies between 0.5 Hz and 2 kHz.• Detect on rising or fallingpast the detection level.• Reduce double counts with optionalno-count wait after detection.• Graph to show angular velocityvalues.• Counts indicated on graph and with optional 'click'sound.Gyroscope sensors will vary in sampling speed, resolution andaccuracy from one device to the next. For indication only.
Light Sensor Counter 1.00
keuwlsoft
The light sensor in your device is continually monitored and whenthe detection level is crossed, the counter is increased by one.Can be used to count each time a light source shines on the sensor.Or alternatively, shine a light on the sensor and count each timethe light beam is broken.• Illuminance values in lux (lumens persquare meter) or foot-candles. • Detect on rising or falling pastthe detection level. • Reduce double counts with optional no-countwait after detection.• Graph to show illuminance values.• Countsindicated on graph and with optional 'click' sound.Light sensorswill vary in sampling speed, resolution and accuracy from onedevice to the next. For indication only.
AC Magnetic Field Meter 1.01
keuwlsoft
Turn your device into an AC magnetic field meter by using itsmagnetic field sensor. Measure the RMS values from AC magneticfields.Fast Fourier Transform (FFT) to obtain the magnetic fieldfrequency spectrum. • Gauge to show the RMS B-field in the X,Y or Zdirections, or from the magnitude. Or alternatively show the DCmagnetic field.• RMS graph to show the gauge readings over time.•Lower display shows time series data or a FFT from it. • Peakindicators for the frequency spectrum.• Save graph data to file.•Units of Gauss or microTesla.Magnetic field sensors will vary insampling speed, resolution and accuracy from one device to thenext. For indication only.Don't put a strong magnet too close toyour device – you risk damaging the sensor/device. However, wavingyour device around in all three axis should restore the magneticfield sensor to good working order.This app is designed forindication and educational purposes only. Always use a suitablecalibrated more accurate device appropriate for the situation whenrequired.
RMS Displacement Meter 1.00
keuwlsoft
Measures displacement by double integrating the acceleration fromyour device's linear acceleration sensor.Any drift or error in theaccelerometer and/or other sensor readings is quickly magnified inthe double integral, such that even a stationary device willquickly show displacement readings going wild. Therefore this Appis for measuring alternating displacements. i.e we apply a driftreduction algorithm to remove any DC component and then measure theAC displacement by means of a Root Mean Square (RMS) value, orperform a Fast Fourier Transform (FFT) to obtain the frequencyspectrum.• Gauge to show the RMS displacement in the X,Y or Zdirections, or its magnitude. • RMS graph to show the gaugereadings over time.• Lower display shows time series data or a FFTfrom it. • Peak indicators for the frequency spectrum.• Save graphdata to file.• Units of cm, mm, m, inches or feet.An example: Movethe device in a circle along two of its axis. You should see twosinusoidal traces 90 degrees out of phase in the time series graph,determine the rotation frequency in the frequency spectrum andobtain an estimate of the diameter of the circle from the gauge orits corresponding graph (when set to peak to peak mode insettings).Linear acceleration sensors will vary in sampling speed,resolution and accuracy from one device to the next. For indicationonly.
Camera RGB Color Picker 1.00
keuwlsoft
Pick, tweak and store RGB colors grabbed from the camera preview.•Hexadecimal RGB color code.• Store up to 250 colors.• Suggestsnearest of 138 html named colors.• Copy color values to clipboard.•Pause image and move target cursor.• Setting for using volumebuttons to grab and store colors.• Turn camera flashlight on oroff. Zoom camera in/out.Note that the camera and screen of yourdevice might not measure or represent color accurately, thereforefor Indication Only.
Draw A Balance Labyrinth 1.00
keuwlsoft
This app allows you to design your own balance game consisting ofballs, obstacles and holes. The aim is to roll the ball(s) into thedesignated target hole(s) by carefully balancing and tilting yourdevice.To design your game, you need some pens and paper. Draw yourobstacles, holes and starting locations for the balls onto thepaper before grabbing the image with the camera. The app will tryto convert the captured image into a game. There is also an editmode, for when the image capture doesn't quite go right. In thismode, move holes, balls and targets about, erase or add newobstacles. Alternatively, use the edit mode to design the gameinstead.Challenge friends and family to complete your game design.Develop your game design skills.
Tabata Timer 1.0
keuwlsoft
Tabata is a form of high intensity interval training (HIIT). Bydefault one Tabata workout comprises a 4 minute workout, dividedinto 8 rounds. Each round comprises a 20 second work period ofphysical exercise followed by a 10 second rest. Adjustable Tabatatimes (0-9999 seconds for each stage). Adjust number of rounds (0to 500). Round progress is indicated by the smaller circles aroundthe timer ring.• Prepare and cool down stages. • Rename Tabata andany of its first 30 rounds.• Modify timings and names for 10different Tabatas.• Choose form various sound and vibrate optionsfor each stage.• Pre-beep or vibrate countdown to next stage.
Camera Color Counter 1.00
keuwlsoft
A counter based on the measured color from the camera previewimage.A blue box indicating the target area is shown on the cameraimage. The target area is analysed and the average colour then usedfor counting. Measures RGB (Red, Green, Blue) and then calculatesHSL (Hue Saturation, Lightness) and YUV (Luminance andChrominance). Also includes an indicator of the color uniformity inthe analysed area.Up to 100 counters can be set with differenttrigger options. Either count when a certain colour is detected(defined by a range in HSL), or when a value such as the red, greenor blue component passes a set level.There are three main modes;Edit (edit counters), Plot (plot measured data) and List(scrollable list of counters).• Use front or back camera. Zoom inor out and lock focus or exposure. Turn camera flashlight on ifavailable.• Graph of values over time. Hue-Saturation diagram.Triggered counts indicated with red circles.• Vibrate or Soundeffects on button presses and/or count events.• Pause button topause measurement, and measure button to take measurements one at atime.• Hexadecimal RGB colour code shown in plot mode.Note that thecamera and screen of your device might not measure or representcolor accurately, therefore app is for indication only.
Torch 1.01
keuwlsoft
Torch (aka Flashlight) - Turns the camera's LED on/off.Free, NoAds.Uses only the Camera and Flashlight permissions.Tap the torchbuttonto turn the LED on or off. LED also turns on when the appopens andoff when the app is closed.
BLE Analyser 1.0
keuwlsoft
Measure RSSI strength of nearby Bluetooth Low Energy (BLE)devices.Connect to them to get a list of Services andCharacteristics onthe BLE device. Read and write to Characteristicsand Descriptors.•Six modes to choose from: Levels, Graph, Meter,List, Report &Read/Write. • View RSSI on a graph, gauge or in alist.• Average,Maximum and Minimum RSSI. • Auto-scale, or touchscaling/panning ofgraphs.• Write ASCII, Hexadecimal, 32-BitIntegers or Floats toCharacteristics or Descriptors.Note that thisapp is for BluetoothLow Energy (Bluetooth 4.0), and will not workwith BluetoothClassic (Bluetooth 2.0).