Before installing the PRO version of the battery, try to make sure it is compatible with your mobile device with the free version:
Characteristics:
* Voice alert in multiple languages
* Alarm delay from 5 seconds to 12 hours
* Widget
* Alert sound selection
* Hide the icon from the notification bar
* Male / female warning voice
Supported Android
{4.1 and UP}
Supported Android Version:-
Jelly Bean(4.1–4.3.1)- KitKat (4.4–4.4.4)- Lollipop (5.0–5.0.2) – Marshmallow (6.0 – 6.0.1) – Nougat (7.0 – 7.1.1) – Oreo (8.0-8.1) – Pie (9.0)