Is it really waterproof enough to swim with?

It carries an IP68 rating, which covers dust and prolonged immersion in fresh water. That suits showers, rain and hand washing; salt water and hot tubs are harder on seals, so rinse and dry it after.

Does it work without a phone?

No. With no display, it relies on a paired phone app to show steps, sleep and sports data. The ring collects, the app reports.

How does it compare with an Oura ring?

It covers steps, sleep and sports modes in a steel ring, but Oura adds detailed readiness and temperature data, a mature app and a subscription. This is the simpler, no-frills option.

Expect the ring and a charging accessory; the listing does not detail extras. Check that a sizing kit or size guide is included before ordering, since fit matters.

Can I wear it 24 hours a day?

Yes, the steel build and IP68 rating suit continuous wear, including overnight sleep tracking. Take it off to charge and keep the skin under it dry.

Is it good for serious training?

No. It has sports modes and a pedometer but no GPS or detailed heart-rate metrics. Runners and gym users wanting real training data should look at a sports watch.