evidence: Amazfit smartwatches will soon get a new app that can monitor blood pressure without the need for a separate arm cuff. PumpBeats is a system that measures blood pressure using the watch's optical sensors, and Zepp Health (Amazfit's parent company) says that it's given impressive results in clinical testing on hospital patients with hypertension. [...] Apps like these can't replace conventional blood pressure monitoring, and still have to be configured using a cuff, but can be a useful extra tool for people managing their condition at home. Zepp Health announced the new blood pressure tool at its Future of Health conference, where it also unveiled a new smartwatch operating system – Zepp OS – which looks set to replace the Amazfit OS used by devices like the Amazfit Bip, GTR 2, and GTS 2.