Help with payments

iOS build supported by iTunes Store: In-App Purchases

System requirements

   iOS 3.0 or later: You can purchase extra content and subscriptions from within an app using your iPhone, iPad, or iPod touch.

You can make In-App Purchases from within an app. When you make an In-App Purchase, you will see a dialog with the item's name and cost. Tap Buy to make your purchase and enter your iTunes Store password.

Another way to get an Deuterium is Converter. If you found Tritium in game you can convert it to Deuterium 1:1