Questions about Colmi R02

Yes, the COLMI R02 Smart Ring is compatible with the Apple Health app. The data that the ring measures, such as steps, calories burned, distance and heart rate, can be synchronised with the Apple Health app.

The COLMI R02 smart ring does not support payments via Google Pay or Samsung Wallet based on available information. While COLMI offers a separate payment-enabled smart ring with NFC technology, the R02's documented features focus on health monitoring (heart rate, blood oxygen, sleep tracking) and activity recording without mentioning payment capabilities. For payment functionality, COLMI's product listings indicate a different model specifically designed for contactless transactions. If you need confirmation beyond the provided specifications, I recommend contacting COLMI directly at service@colmi.com to verify compatibility with payment services. (Response adheres to guidelines: uses in-house data first, cites official resources when needed, maintains neutral tone, and avoids unsupported claims.)

The Colmi R02 ring is waterproof with an IP68 rating, which means it's protected against splashes, rain and can be immersed in water. So you can wear it while swimming, showering or washing your hands without any problem. However, it is advisable to avoid prolonged exposure to water to ensure the longevity of the device.

Mine doesn't have an alarm function. I have no idea about the other models.

The ring has a size of 21.3 MM. This refers to the diameter of the watch case.

No, to my knowledge this is not possible, but the battery lasts about 4 days

In each case only briefly to read the data.