Wahoo devices seem good. I have a Tickr. But in late April Wahoo Fitness was updated for the first time in a couple of years and reliability suffered. Fitness was the most stable and lowest resource activity app I'd used. Now it's about as reliable as Strava, which means it glitches just often enough to be annoying. But it seems like the glitches have cleared up on my Android and iOS phones the past week.