Corio
works with Oura

Oura shows the tag.
Corio shows the nights.

You tag your nights — late meal, workout, magnesium, hot room. Oura keeps the list and analyzes almost none of it: custom and repeating tags never get a Discovery. Corio takes every tag, including those, and shows the nights behind it against your own baseline — so you know what moved your HRV and sleep, and what didn't. Oura says what. Corio says why.

Download on the App Store
Free to start · iPhone · needs an Oura Ring
Last night, Oura says sleep 87 · HRV 35
−4pts
Tap a tag. These are the developer's real nights, computed the way Corio does it for you.

What 298 of my own nights showed

Real numbers from the developer's Oura Ring (298 nights, Nov 2025–Sep 2026; the chart above is the last 108), computed the same way Corio does it for you: each tag's nights against your own 7-night baseline. No averages from other people.

Late bedtime → sleep score
84 → 76
Sleep score in bed before 11 pm vs after midnight. Every hour later cost about 5 points — and 40 minutes of sleep.
120 vs 56 nights
Late bedtime → HRV
0%
Same nights, HRV didn't move: 31.3 vs 31.7. The score drop was sleep duration, not recovery. Oura can't tell you that — the tags can.
298 nights
One warm night, no AC
49 → 29
HRV halved, resting heart rate 53 → 59 — on a night with 8.7 h of sleep and a sleep score of 91. The score looked fine. The body didn't.
1 night, +0.3 °C skin temp

How it works

1 · Connect

Sign in with Oura. Corio pulls your nights and the tags you already log in the Oura app.

2 · Tag as usual

Keep tagging in Oura or in Corio. Late meal, caffeine, workout, travel, illness — anything.

3 · Get the receipt

Every morning: what changed, by how much, and the exact nights that prove it. Share it if you like.