Bought my chinese no-name (it probably does have a name if I saved the box, but there's no brand on the device itself) for $10. Time, stepcount, calories, distance, heart rate, BP, O2 sat, sports functions, sleep, etc. The watch does lose about 45 seconds a day, so I have to sync it once a week or so to keep the time display in an acceptable range. The app is otherwise irrelevant to me. Charge lasts about 6 days.