A diary app looks like calculator.
On the surface, this app looks like an ordinary calculator. But once your input your password, you will get a diary app.
The diary is well hidden from the public
except for you.
Write down your good mood and bad mood in your secret journal.
Make you happier every day.
![Hide Apps on Android Within a Seemingly Innocent Calculator [How-To] screenshot 1](https://i.ytimg.com/vi/22w2xnV35Ok/mqdefault.jpg)
9Apps 4.9
