With phone in airplane mode and watch cell radio enabled, here is a list of apps I tested that work when untethered:
* My Tracks.
* Alarm
* Flash light
* Stop watch
* Timer
* Google Maps (map only, navigation doesn't work)
* Messenger (text message from watch number).
* My Tracks.
* Alarm
* Flash light
* Stop watch
* Timer
* Google Maps (map only, navigation doesn't work)
* Messenger (text message from watch number).