FBReader F.A.Q. Paid versions of FBReader FBReader Premium for Android Is FBReader Premium a one-time purchase or a subscription?

If I purchase FBReader Premium, do I pay once? Or is it a subscription?

You pay once and have access to the Premium for unlimited time. Please note that the purchase is per Google/Huawei account. If you change the account, your purchase cannot be transferred, sorry.