WatchMaker Watch Face - With WatchMaker you get access to 1000's of stunning watchfaces and a designer to build your own.
Strava - The #1 app for runners and cyclists
Feisar Watch Face - Feisar Watch Face is an interactive mobile app offered by thema that provides you a variety of beautiful watch faces and clock widgets for your mobile phone.
Amazfit GTS WatchFaces - Amazfit GTS WatchFaces is an app that allows you to access new and beautiful watch faces for your smartphones.
CT FIT - CT FIT is a fitness companion app introduced by the CT App Team that helps you in tracking all-day activities, including exercise time, distance covered, and sleep time.
Gadgetbridge - A free and cloudless replacement for your gadget vendors' closed source Android applications.