Sorry for topping an older thread, but after working perfectly for almost two years straight and hundreds of rides, my Wahoo Fitness app stopped working this week (Android). When I launch it, crashes two seconds later. I uninstalled and reinstalled the app, and it was worked fine.. until I connected my HR strap sensor, then it began crashing again. The HR strap is the same Garmin HR I've used with Wahoo Fitness since the beginning.
So maybe something in Android changed, or in the app, but either way, this stinks. I don't have time in my life to dick around with a stupid app.