There are a few main differences between the Cosmo JrTrack 5 Kids Smartwatch and the Fitbit Ace LTE. These include:
-->911 Calling: Cosmo's JrTrack 5 is equipped with emergency calling capabilities, which the Fitbit Ace does not have.
-->True Texting: JrTrack 5 includes a keyboard for sending messages, and Fitbit Ace does not. JrTrack is also equipped with true SMS/MMS too for sending/receiving pictures, videos, gifs, etc. Ace messages are sent through the Fitbit ace app.
-->International Coverage: JrTrack 5 provides calling coverage across the US, Canada and Mexico. Fitbit Ace only works within the US.
-->Price: JrTrack 5 retails standard for $149.99 while Fitbit Ace sells for $179.99.