A:AnswerSorry it has taken me so long to get back to you. It works well with my iPhone X and my Samsung Galaxy 9. If the 5s is up to date on ios, I think it should. When I got the Versa, the package said iPhone 6s and up. Maybe contact FitBit support, they should be able to be more help.
A:AnswerThere are hundreds of different watch faces, most free, a few paid, to download. Digital, analog, some have second hands, some show temp, steps, etc.
A:AnswerYou can control the normal features such as the volume, next, pause, play, and back. The Fitbit has a standard mp3/music player control feature. But the Fitbit does not have a standard Spotify app just yet, where pandora does.