I've been looking for a solution to this problem for a long time and no luck. The Apple ecosystem is very closed, but I believe that if Wahoo wanted, they could work around it by doing as Zwift does with Zwift Companion.And that would mean having an Apple Watch version of the Elemnt App just to get the heart rate and send it to the phone, but I guess that could cannibalize their Tickr product and they may not be super interested in that...