Sideloading is quite bad. If you’re in the EU, I know you can use AltStore PAL, which costs money (~€1.50 a year), but all you’ll be getting is emulators, virtual machines, clipboard managers, and torrent clients.
There is another method for sideloading that works anywhere and lets you download modified apps, but it is very limited, tedious, and probably insecure. I’ve done it, it’s not worth it. Better to stay on android or use a browser with adblock or something.
I don’t think iOS has any specific limits to do with NSFW stuff, I’ve never heard of anything anyways.
Pirating games is probably not going to be worth it either since you have to sideload apps with the second method.
Other types of piracy are probably fine. If you have AltStore PAL you can get a torrent client and an emulator.
Forest is a simple step counter that shows you the steps you did today, with a little extra info.
Doable is a tasks/reminders app. It’s not the most feature rich, and notifications are only in beta, but I love the design and it does what I need well.
Data Monitor shows you how much data you’ve used in your current plan, and you can see which apps use the most data (or wifi).
Quillpad for notes.
LibreOffice Viewer lets you open word documents and the like.
Squawker lets you open Twitter links more privately, and even follow users to see all of their posts, but requires you log in with an account.
Breezy Weather is a really nice weather app.