If you need to lock your notes,I recommend that you use it withAppLock.If your phone spec is low,For safe use Turn off autoupdates in the play store settings. Backup/Restore:- In settings,tap the cloud icon. Change/Delete Category:- In settings, tap orlong press an item of list.Add Category:- In settings, tap the penicon on title bar. Writing the Normal note:- In the note list, tapthe red pen.Writing the Important note:- In the note list, longpress the red pen.Using the notes to the todo list / check list.-In the note list, tap a note then tap check-list icon.- It supportsAndroid 4.1 or later. Select-mode of note list:- Tap the scissorsicon on title bar.Standard-mode of note list:- Tap the pen icon ontitle bar. checking All items:- In the select list, long press aunchecked item.unchecking All items:- In the select list, longpress a checked item. Delete a note:- In the normal list, longpress a item.Delete notes:- In the select list, choose items thentap the red scissors.Exchange text:- In the select list, select twoitems then tap the red scissors. Using the read mode:- In the notelist, tap a item then drag to the left or right.Copy or Share thetext:- Press the body of note view.Change the type of the readmode:- In settings, tap the option icon.