It provide a quick way for accessing "App Info" for the foreground app. It show the info on your notification panel. It can show permissions, traffic, storage statistics, etc. It also show extra info on status bar.

Notification Panel: App Info of foreground app
Notification Icon: Network meter, RAM, battery, date, etc.

App Info Mini, for Lollipop, Marshmallow and Nougat.
From version AppInfo Mini 1.0.56:
1.0.56
* Build-in hide system notifications option for android 8+
* Bug fix

1.0.55
* GDPR update (EU)

1.0.43-49
* Add "Select SIM card" option for dual SIM devices
* Remove irrelevant permission
* Change icon
* Bug fix
All versions
July 6, 2018
April 23, 2017