When using a phone to log the session data, would it be possile to add heart rate data from a heart rate sensor - i.e. Wahoo Tickr ?
Thanks for the suggestion! Heart rate integration is technically possible, but supporting Bluetooth HR sensors properly means handling a wide range of devices and their individual quirks — Wahoo TICKR, Polar, Garmin HRM, and many others each have their own connection behavior. That’s a meaningful development investment, and right now it’s not something I can prioritize.
That said, if this is something more users are interested in, it would definitely move up the list. Feel free to add a 
or reply here if you’d like to see this — it helps me understand where to focus.