A free app for Android, by Dead Simple App.
WiFi or HotSpot tethering is the process of sharing internet access of two devices. You can share your mobile hotspot to another phone or tablet or even a laptop. However, tethering is not that simple to configure, especially if you're doing it for the first time or a new device.
This app helps eliminate a few complicated steps. When you open the application and turn on the WiFi tethering/WiFi HotSpot, the tethering is turned off, and vice versa. The application will close on its own after a few seconds.
This One Touch WiFi Tethering app is available for android phones and tablets. Although for Android 6.0, two more touches have to be made because of restrictions.
