is watch and cellphone proximity always necessary
On my regular bicycle ride of 2 hr duration can I leave the cell phone at home? Can I sync the watch and cell after coming home? Does the phone have enough memory to store heart rate data as well as GPS data ? On week ends the run could stretch to 4 hrs/100 kms. Would that be too much data?
If I could, I would rather leave the phone at home while on the bike?