Apple's insistence on taking a 30 percent cut of most in-app purchases (and running those purchases through the App Store) has led to many media providers simply removing direct purchases altogether. Just ask anyone shopping for e-books at third-party stores. You won't have to worry about that with Prime Video from now on, though. Amazon has reached an agreement that lets you rent movies in Prime Video on iOS and Apple TV devices using its payment system, not Apple's. You won't have to visit the web first just because you have Amazon credit to spend or just prefer a platform-independent video service instead of iTunes.