It is important to update all apps on your device to ensure you have access to all features and bug fixes that are available.

To update an app on an Android device:

1. Open the Google Play Store app.

2. Tap Menu (hamburger menu - three lines) and select My Apps & Games. 

3. Apps with an update available are labelled Update.

4. Tap Update All to update all apps. For individual apps, find the specific app you want to update and tap Update.