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Why is Google allowed to remove purchases from our Play Store accounts without telling us?
(www.androidpolice.com)
This is a most excellent place for technology news and articles.
Not only that. If you buy an app, you are at the mercy of its creator. If they decide they want to fill it with ads and tracking, or switch to a subscription model, there's nothing you can do. You can't rollback updates, you can't install an older version from the play store. If they decide to remove it from the store, you won't be able to install it any more.
Actually there's websites with archives of old apk files for apps.
Kinda hard to just trust those sites not to hide malicious shit in there.
That's why Android apps must be signed. Tools can show an app's certificate hash and if two app versions' hashes match, they're equally trustworthy / from the same source. I think APKMirror does this and it's actually quite trusthworthy.