When comparing tvOS vs Fire OS, the Slant community recommends Fire OS for most people. In the question“What is the best set-top box OS?” Fire OS is ranked 11th while tvOS is ranked 14th. The most important reason people chose Fire OS is:
Since it is based on Android you can sideload any Android app.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro For Apple fanboys
If you're already on the Apple ecosystem so you don't have much choice.
Pro Sideloading
Since it is based on Android you can sideload any Android app.
Pro Cheap devices
Amazon FireTV devices are cheap and have often a discount.
Cons
Con Vendor lock-in
You have to use their services their app store and so on. There is no way to sideload apps.
Con Expensive
It's a very expensive device compared to other devices with the same features.
Con Ads
There are plenty of ads for Amazon Prime or products.
Con Amazon account
Needs an Amazon account.
Con Focuses on Amazon content
The main purpose of the stick is to provide a portal to Amazon's various online services.
Con Proprietary
The UI is proprietary software.