COSS is dedicated to design and development of apps for the Fitbit Ionic (and upcoming Fitbit OS models) healthtracker/smartwatch.

We have many years of experience in development for the wearable and mobile platform. We develop for iOS, Windows and Android.

We hope you enjoy our clockfaces and apps which are solely designed for Fitbit OS. Support for our clockfaces and apps can be obtained using the appropriate menu choice at the top of this page.