I have paid for the full version. How do I activate it on another device?

In the reading mode, tap the centre of the screen, then the reader logo at the top. In the popup dialogue, select “Already purchased”.

In rare cases, this way does not work due to App Store cache failure. If you are sure that your Apple ID is the same as you used for the purchase, select “Purchase” instead. It is not possible to buy the full edition twice for the same account. So, instead the iOS would say “Already purchased”, and activate the full version for you. Please, only use this way if you are sure regarding the Apple ID. The refund procedure is complicated, and we cannot help with it.