Help with payments
From Astrolords
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 earned or found Tritium in game you can convert it to Deuterium 1:1
Click on the Sell/Buy buttons on the Top panel to open Converter window