I think about this problem during my longer runs. The HR stuff can be solved with a Bluetooth compatible chest strap, so I just need GPS and cellular (for emer

I think about this problem during my longer runs. The HR stuff can be solved with a Bluetooth compatible chest strap, so I just need GPS and cellular (for emergencies). I always have my phone in a little band around my arm or in a bag, so the watch itself just needs to display telemetry and manage inputs like start/stop, laps.