Below is the procedure of updating your installed Android apps on your device.
1. Open Google Play on your phone.
2. Now, tap right key and select the My Apps option.
3. Wait for a few seconds and this will open up all the installed apps on your device. If there are available updates you’ll see red/orange text that reads as Update to the right of the installed app’s name.
4. Tap Update all at the top of the screen to update all your apps at once. Also, you can update them individually by tapping the app you want to update, and then choose Update from the menu.