Oura ring just released an update to their software that lets you record a meditation moment.
I use other apps to meditate. (Currently Waking up by Sam Harris.)
If you still want to get the benefit of quantifying your meditation you can have your ring measure while using a different app. Just use these settings:
These keeps the Oura app silent and allows you to use another guided meditation app.
After you finish your favorite meditation app, then switch to Oura’s application and remember to rate and review your moment to learn your heart rate variability.