For iOS:

1.Open the App store. 
2.Press the Updates icon on the bottom panel. 
3.If a new update is available it will be shown in the list. Tap Update next to the update description to download it.

If you want our application to update itself automatically you may do the following: 

1.Go to Settings - iTunes and App Store. 
2.Switch Updates on in the automatic downloads section. 

For Android:

1.Open the Play Store application. 
2.Press the Menu icon in the top left corner, and then My applications and games. 
3.Find the game in the list and tap it. 
4.Press Update when the game page opens.

If you want our application to update itself automatically you may do the following:

1.Open the Play Store application. 
2.Press the Menu icon in the top left corner. 
3.Go to the Settings section. 
4.Press Auto-update apps. 
5.Choose one from below: 
- Auto-update apps at any time when they appear in the Store. Updates will be downloaded via both Wi-Fi and your mobile network. 
- Auto-update apps over Wi-Fi only. Updates will only downloaded when you device is connected to the Internet via Wi-Fi