This is simplest heart rate app I could find. All I want is to show the heart rate, and graph it! This app is fine for that. No annoying graphics, just the data. There’s some opportunity to improve the graph display, the scaling and tick marks move around in a way that makes it hard to rapidly read, especially on my bicycle-dashboard mount, but it’s fine. The current rate is nice and big, and that’s what counts. One small bug/feature request that I’d ask though: ignore values of “0”. It’s not valid data (I hope!!!) and throws the graph all off. If there’s a lot maybe throw in a gray “unknown value” or something, or just a gap… Anyway! Best heart rate app.