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Smart rings / Manufacturer

Oura smart rings

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Models listed
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Purchase packages
1

Oura

Ring 4

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A titanium ring for iOS and Android with red, infrared and green LEDs, a temperature sensor and an accelerometer, rated for 5 to 8 days in Oura's tests on sizes 8 to 10; most insights need an Oura Membership.

Longest stated ring battery life
8 days
Water rating
Water resistant up to 100 m (328 ft). Oura does not recommend scuba diving or more than 12 hours submerged, and says it is not suitable for diving.
Core features without a subscription
No

Purchase packages
Oura Ring 4 Silver, buyer-selected size (US)

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Before you choose.

Does the ring work with your phone?

Some rings pair only with Android or with one brand of phone, and some features need a particular phone. Read the stated phone and app requirements before choosing a finish.

What does the app show without a paid plan?

A membership can be required for most insights, optional for add-ons, or not offered. A free first month is a trial, not a permanent entitlement.

How long does it run on your size, and where can you wear it?

Battery and weight change with ring size, and makers test under their own settings. Water ratings use ATM, IP or meter figures with conditions that are not interchangeable.