App that work with fitbit devices?

The music application suitable for Fitbit devices can be Deezer. By using the Tunelf Deezer music converter, you can download Deezer songs to your Fitbit watch even with your Deezer free account. Tunelf Deezer Music Converter is a powerful music downloader designed to help Deezer users download songs, albums, playlists, and podcasts from Deezer to various pure audio formats such as MP3.