The purpose of this app is
It reads the battery cycle information of the phone and informs the user.
Search for the file called battery_cycle in the file system of your phone.
It is implemented to read the contents of the file and then display it.
Since the file may not exist depending on the version of Android,
The results are different for each mobile phone.

Tested on the following phones.
LG G6 (8.0.0)-Uplus,
Samsung Galaxy On7 (2016)