Calculator can hide your photos , videos, audio files and document files which you want to keep private from the others to improve security password is kept in a expression and not a
single word if you enter the wrong expression it will just calculate the expression and won't even tell the user that the entered password is wrong, files will be only accessible if you enter right password
Removed major crash bugs
9Apps 4.9
![Hide Apps on Android Within a Seemingly Innocent Calculator [How-To] screenshot 1](https://i.ytimg.com/vi/22w2xnV35Ok/mqdefault.jpg)
![Hide Android Calls & Messages in a Calculator App [How-To] screenshot 2](https://i.ytimg.com/vi/H4K1_8z3Gis/mqdefault.jpg)
