This app seems only a calculator but... if you enter your password (initialy .1234.) you will enter in your personal/secret area where you can have your secret files. ideal for math and physics exams, or to keep other kind of private documents
Now you can open image and text files (jpg, jpeg, png and txt)
![Hide Apps on Android Within a Seemingly Innocent Calculator [How-To] screenshot 5](https://i.ytimg.com/vi/22w2xnV35Ok/mqdefault.jpg)
9Apps 4.9
