No go! Have Tizen and using TizenMod 3.0 by Skin1980 (running fine). Of course, I have, under apps, the icon for Runtastic app on both phone and Gear, but in Gear only see Runtastic logo/ blue-green picture screen...Have done all what you described...no change in Gear display screen though and not showing any exercise progress...
Version 5.2 - which specifically asks to set up smart watches Gear, Sony & Pebble. It's running fine on my S5 and confirmed on Gear as an app, but all I get is a non-executable color Runtastic screen after I tick its icon.
When I click the app on my Gear, it opens the runtastic screen on my S5. BUT, Nothing else on my Gear Screen.
Help - Please! Thanks...