I'm a recent-ish convert and found this to be true, there's definitely plenty of rubbish on the app store similar to the play store and trying to avoid subscription services where it shouldn't be necessary can be frustrating (I'm not paying a monthly fee for a calculator). But so far I've generally been able to find high quality apps that are pay once/sync via icloud/support sign in with apple that means I've spent more money on apps in a couple of years then I did in the previous 10+ with Android