Totally new to this topic with a new moto z play. I went with Wahoo for heart rate, cadence, and speed. We like the Wahoo ap HR range display and the verbal summary each mile. We are new to cycling and tandems so the feedback helps us manage level of effort and shifting. Wahoo will also share with Strava and MFP. The only issue I have had is the cadence and speed sensor will only pair with one phone so the stoker uses GPS speed and does not currently have cadence information.

You can put your phone in a jersey pocket and Wahoo will give you a verbal update either every mile or every five minutes. Just enough information to keep in the training zone you want.