You can set your tablet to update apps automatically. Remember, you need to activate your Apple ID.
Find "iTunes & App Stores"
Turn automatic update of apps on or off
Tap iTunes & App Stores.
Turn automatic update of apps via mobile network on or off
Tap the indicator next to "Updates" to turn the function on or off.
Return to the home screen
Tap the indicator next to "Use Cellular Data" to turn the function on or off.
Tap the Home key to return to the home screen.
*Please refer to the Apple website for more information or further support.*