Music Player
Do you have to have your phone by you in order to play music or does this watch have space to upload playlists like the TomTom Spark+Music does? The TomTom has 3GB of space available for music and enables you to leave your phone at home.
You can't upload music to the Fitbit Blaze. It only has the ability to control the music playing from your phone. So if you're phone is playing music, you can control things like volume up/down, forward a song and back a song through the Blaze.