I have used Jolla's Sailfish OS and it is the best mobile UI out there, period. When I first used it, excited me in a way I haven't felt since I first used the

I have used Jolla's Sailfish OS and it is the best mobile UI out there, period. When I first used it, excited me in a way I haven't felt since I first used the original iPhone in 2007. Every aspect of the UI is designed to be a superb mobile experience for simple, one-handed use. Whereas other platforms compromise the phone UI to force a consistency with other form factors as part of a larger strategic play, the Sailfish team had one focus: make the best damn phone UI possible.