To do a geometrical and mathematical sum, converter
MathX allows to calculate most of the parameters of two-dimensional and three-dimensional geometric shapes, convert units of measurement and perform algebraic calculations.

This app allows the user to enter up to 9 different lists of students. The user can then click on the dice button to select a student from the list randomly. The app can speak the name of the student aloud, and the user can keep track if the student answers a question correctly or incorrectly.

Stop being afraid to sing out of tune! Victor Baumwolle's Vocal Intonation Trainer will dramatically improve your vocal flexibility and singing skills. Use it regularly and your singing level will benefit in all kinds of styles, whether you sing karaoke, sing in a choir, in a popband or sing classical songs.

The Ultimate Hacking Reference!

This application details various different hacking methods, exploits, software attacks and more! If you ever wanted to know what a SQL injection is, what social engineering is, or simply already know most of the material and just want a handy reference, with How-To's, cheatsheets, quick references and more, THIS IS THE APP FOR YOU!

Our review from DroidTweak:

"The Best Hacking Reference Available! For Beginners and Experts alike! 5/5 Stars!"