@kalivene While I wholeheartedly agree with this, the more interesting question to me here is: Google Play and the Apple AppStore has payment procedures included. Given the idea of providing some sort of cash to app developers, and be it as one-time donations, is more than just worth recommending, I always have and still do wonder why #fdroid and other alternative app stores don't come with a solution to that problem baked-in too. It would just sound very worthwhile to do so (and the other way 'round also help independent software developers who, by now, are stuck with Google Play on Android because they can't afford giving their stuff away for "gratis"...).