With apps that are utilities, it's fine to charge once. Like how one would charge once for their hammer in store. The "in-app purchase" thing is good when some

With apps that are utilities, it's fine to charge once. Like how one would charge once for their hammer in store. The "in-app purchase" thing is good when someone designs their "app" like a fucking cigarette hit (or a cup of coffee). They have to make the user desire that hit every day. Games do that because they are addictive.