By launching this app the WiFi tethering/WiFi HotSpot is turned on.
After a few seconds the app is closed automatically.

If WiFi tethering/WiFi HotSpot is turned on function of the app is reverse - tethering is turned off.

Necessary settings is made automatically but initial configuration of the hotspot has to be made manually.

From Android 6.0 two more touches have to be made because of restrictions.











Credits:
Used icons made by Rami McMin and by Freepik from www.flaticon.com