Amazfit Pop 3S

Pop 3S features 24/7 heart-rate monitoring as well as blood oxygen, stress and sleep tracking. It also covers over 100 sports modes and brings an IP68 rating for dust and water resistance. There’s no onboard GPS or NFC here though. Pairing happens over Bluetooth LE 5.2 and thanks to the built-in speaker, Pop 3S supports Bluetooth calling via your phone. There’s a 300mAh battery which is rated at 12 days of typical usage.