Itd be much smoother if the app just worked like most other apps and you bought stuff from the App Store.
Instead, theres this multi-step login process (on each device you own) for each purchase you make. Half a dozen dialogs pop up. Not a great experience.
If you dont use their store, then if you delete the app by mistake or get a new phone or want to use it on your iPad, you have to buy every map all over again for each device.
Who thought this was a great idea?
Púca about Avenza Maps: Offline Mapping