Ability to run some code in background

[paperinik]

It would be nice to be able to have a service API that allows apps and watchfaces to run some code in background, mostly at specific time intervals or when some events happen (accelerometer > threshold). This would allow things like having watchfaces do stuff while another app is active (e.g. hourly chime) or have apps do background stuff when they are not running (e.g. sync motion data with a companion or other fun things).

[JonFitbit]

Thanks for this. Some interesting use cases there too. Everyone please add more use cases, and vote if you would benefit from this.

[paperinik]

More use cases: ability to run code in background when BT connectivity changes (phone is out of range)

Ability to detect movement when not running (almost smart alarm?).

[paperinik]

And more: ability to wake up the service when receiving a message from the companion.

[jakef]

Id' like to run code in the background which can access heart rate and send a notification if one's heart rate is too high