Annihilation is one of the best sci fi films I’ve seen over the past 10 years. That is a big statement but I genuinely feel that way! Also, I love how it is a female led film but there isn’t a big deal made of this. If you want to watch Annihilation online free then here are a few options:
The entire film is available on Amazon Prime Video for free and you can watch it completely free by signing up here. Just cancel before the 30 days is up and you won’t pay anything.