Cipher is an application that uses public-key cryptography for theencryption and decryption of text. In essence, it uses theDiffie–Hellman key exchange method. In order for this app to work,you and the person with whom you exchange encrypted messages mustdownload it.

MathBox is a collection of some useful mathematical tools forcalculations and reference. It has three categories"Combinatorics", "Geometric Shapes" and "Numbers" with each oneinclude the following: ► Combinatorics: • 5 common combinatoricsformulas for quick calculations ► Geometric Shapes ►► Calculate thearea of the following Two Dimensional Shapes: • Circle • ConvertRadians / Degrees • Circular Sector • Ellipse • Triangular • Square• Rectangle • Parallelogram • Trapezoid ►► Calculate the surfaces& volumes of the following Three Dimensional Shapes: • Sphere •Torus • Cylinder • Cone • Cube • Parallelepiped • TriangularPyramid • Square Pyramid • Triangular Prism • Pentagonal Prism •Regular Octahedron • Regular Dodecahedron • Regular Icosahedron ►Numbers • Mathematical Constants • Check if a number is prime •Find all the prime numbers up to a number • Find the first nFibonacci Numbers • Convert Radians / Degrees