In addition to purchasing credit on Bidvine.com, you can also do so via the Bidvine for Professionals iOS App.
To purchase credits via the app, select "Account" then "Purchase Credits". Click "Purchase Credits" again and select your desired bundle. At this point, you can select your desired bundle and authorise the payment by entering your iTunes password.
Please note that credits are more expensive when purchasing via the app. This is due to the markups charged by Apple. To get the best prices on credits, purchase them directly on Bidvine.com. In addition, we recommend you enable auto top-up after your first purchase so that when you run out of credits, the system automatically re-purchases your bundle of choice.