If you prefer that your iPad or iPhone performs all the updates automatically from now on (not only of our application) go to Settings,

and click on the iTunes Store and AppStore on the left of the screen (see the red arrow in the image below); look at the right Updates option and activate it as shown by the yellow arrow.

If you just want to update only once our game, open the application AppleStore,

and click on Updates (see the red arrow in the image below);

you will see a list of the apps to be updated. Update Buraco PRO by clicking on the Refresh button (see the red arrow).