I would challenge that. iOS Appstore is way more known to charge for apps and have less IAP/Ad financed App. Also, good examples are Steam or other Game Stores

I would challenge that. iOS Appstore is way more known to charge for apps and have less IAP/Ad financed App. Also, good examples are Steam or other Game Stores - but in order for that to work, you need a refund policy (i.e. have a 30minutes refund period). For Apps with one-time use that can't have a return policy, there could be separate indicators/warnings during purchase.