Battery monitoring 3

According to some studies, in order to maintain the health of the battery, we must not exceed the limits of overcharge and discharge of the battery, limits that correspond to 100% and 0%. But additionally, in order to extend battery life, it is advisable not to reach 0% or 100%.
This application monitors the battery charge level and alerts by sound and vibration when it reaches the default levels of 25% and 97%. When it reaches 25%, it warns and recommends charging the phone and at 97% warns and recommends disconnecting the charger. These warning levels are modifiable in the application settings. Also, the warning mode can be changed in settings.
In comparison to the other variants of my monitoring application, this variant can be used for any phone or tablet, no matter what the battery voltage, because it measures the charge percentage and not the battery voltage.
The monitoring service starts when the phone is switched on.
Warning: Sometimes when you start your phone, there is a notification message that does not disappear unless you start the application once.
The sound alert can be stopped if you are at a meeting by touching the warning message in the phone status bar or by double-tapping when the phone lock screen appears.
On some mobile devices (phone or tablet) you need to manually permit the start of application when you start your mobile device.