We’ve a large multi page thread on here somewhere with recommendations, I meant to update it a few weeks ago but can’t find it...
I don't download anything, I just stream. I tend to use Kodi through my Android box via The Crew add on with my Real Debrid account linked. There are numerous free apps to use but they're becoming filled with ads. Obviously they need to earn out of it. I think it's been mentioned on here before about premium subscriptions. I used to have one when it was under £50 a year, but it's now much more expensive. I've never had a problem or a message while streaming. If you see the link to the filelinked code I use (message thread) he lists a load of free streaming websites as well as many apps, including modded ones where the ads are removed. My best advice is to get Real Debrid. It makes a huge difference for a tiny payment