The Oura Ring 3 and 4 are two smart ring options from Oura, a well-known brand in the health tracking industry. The main difference between the two rings is their design and features. The Oura Ring 4 has receded sensors that make it more comfortable to wear compared to the Oura Ring 3. It also offers expanded sizing, with sizes four through 15 available, whereas the Oura Ring 3 only goes up to size 13.

The Oura Ring 4 also boasts a longer battery life of up to eight days, although during testing, it was found that users can expect around five and a half days. In contrast, the Oura Ring 3 has a battery life of up to seven days, with actual usage time being around four days.

When it comes to software updates, both rings have received improvements such as automatic heart rate monitoring during workouts, an app redesign, and upgraded daytime stress features that help contextualize physiological stress. However, the Oura Ring 4 also includes new features like meal logging through its camera and AI.

Ultimately, the choice between the two smart rings depends on what features are most important to you. If comfort is a top priority, the Oura Ring 4 may be the better option. But if you're looking for a more affordable option with similar features, the Oura Ring 3 could be the way to go.

Source: https://www.zdnet.com/article/oura-ring-3-vs-oura-ring-4-which-smart-ring-is-right-for-you/#ftag=RSSbaffb68