This is just a normal calculator in android.But it can launch X App Hider ,X Diary, X Notes ,and so on ...when it`s icon is hide from launcher.
This is a plugin of X series app,when it is hiden.


How to launch "X App Hider" from XCalculator ?
1.Launch XCalculator .
2.Input "1.yourPassword=".For example , if your password is 1234.you must input 1.1234=.When "=" input,X App Hider will launch.
When you input "1.fourDigits=".No metter if fourDigits you input is your correct password,the X AppHider will launch.If fourDigits is your password,you will not input password any more,but if fourDigits is not your password,you must input correct password to enter,only if password protect is OFF.

List of supported apps:
1.X App Hider : by "1.YourPassword="
2.X Diary : by "2.YourPassword="
3.X Notes : by "3.YourPassword="
4.X ImageLocker : by "4.YourPassword="