Keep your kids or friends inside one app (Android)

You can pin an app's screen to keep it in view until you unpin it.

For example, you can pin an app and hand your phone to a friend. With the screen pinned, your friend can use only that app. To use your other apps again, you can unpin the screen.

Turn on screen pinning

1. Open your phone's Settings app.
2. Tap Security or Security & location >Advanced > Screen pinning.
3. Turn on Screen pinning. 

When screen pinning is on, you need to enter your PIN, pattern, or password before you can unpin.

Unpin a screen

1. Choose how to get around on your phone.
2. To unpin a screen:
   • Gesture navigation: Swipe up and hold.
   • 2-button navigation: Touch and hold Back and Home
   • 3-button navigation: Touch and hold Back  and Overview .
3. If you're asked for your PIN, pattern, or password, enter it.

Also read:

An article by Munna Suprathik