Sailfish is a Linux-based mobile operating system primarily targeted at mobile phones.
Ranked in these QuestionsQuestion Ranking
Pro Unique gesture-based interface
There are no button needed to use it.
Pro Lower power consumptions
Pro No annoying search bar that you might not be able to remove. You can actually manage your files.
The third option to iOS vs Android
Pro Inbuilt Terminal app and ssh essentials.
Smartphone for power users, not just for users
Con Only a few available phones
There are currently only a few available phones on the market with Sailfish OS and both the Jolla and the Jolla Tablet are out of stock and unavailable.
Con Only a few native apps. Needs Android support to access many apps.
Users may need to install google play -store or other alternative android app store to access your bank's app or any highly specific app you might need.