What does the Oura connection bring in?

Sleep (with HRV, resting heart rate and breathing rate), readiness, blood oxygen, daily steps, your workouts and, if you allow it, all-day heart rate. Oura's own consent screen lets you untick some of these: Trailwise then skips what you left unticked and still stores the rest.

Oura Gen3 and Oura Ring 4 share data with other apps only while your Oura Membership is active, and blood oxygen and all-day heart rate need a Gen3 ring or later. Your ring hands last night to Oura through the Oura app, so open the Oura app in the morning and last night's sleep reaches Trailwise soon after. To stop sharing, disconnect Oura here or remove Trailwise's access in your Oura account.