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Oura HRV analysis, on your desktop

A single HRV number is noise. Vitra Health plots your Oura rMSSD against your own 7-day and 60-day baselines, draws a personal normal-range band, and can overlay a rolling coefficient of variation — so you see the trajectory, not just today's reading. All computed locally, in plain English.

Heart-rate variability is one of the most useful signals your Oura Ring records — and one of the easiest to misread. Day-to-day it bounces around. What matters is where today sits relative to your normal and which way the trend is heading. Vitra is built to show exactly that.

What Vitra shows

Metric
Overnight rMSSD (ms), as recorded by your Oura Ring.
Baselines
Today plotted against your rolling 7-day and longer-term personal baselines — not a population average.
Normal range
A soft band of your personal mean ± 1 standard deviation over the visible window. Inside = unremarkable; outside = notable.
CV overlay
Optional rolling 7-day coefficient of variation, to surface non-functional overreaching the trend alone can hide.
Plain-English read
A one-sentence interpretation: calm nervous system, building fatigue, or a clear outlier — with the actual numbers.
Local
Computed on your machine. No cloud, no Vitra account.

Why baselines beat a single number

An HRV of 42 ms means nothing on its own. “42 ms, a little below your usual 55” means something. Vitra never shows a value without its context — your trend, your range, and a plain-language read of whether it's worth acting on.

General education, not medical advice. HRV is sensitive to measurement method and to a lot besides training load. If your numbers concern you, talk to a clinician.

Frequently asked

What HRV metric does Vitra use?
Vitra reads the overnight rMSSD that your Oura Ring records and works in milliseconds. It plots today's value against your own rolling baselines rather than a population average.
How does Vitra show whether my HRV is normal?
Each HRV chart draws a 'normal range' band — your personal mean plus or minus one standard deviation over the visible window. A value inside the band is unremarkable; outside it is worth noticing. The band is computed from your data, so 'normal' means normal for you.
What is the coefficient of variation overlay?
Vitra can overlay a rolling 7-day coefficient of variation (CV) on your HRV. Combined with the trend, CV helps distinguish ordinary coping from non-functional overreaching — a falling HRV with a falling CV is a different signal than a falling HRV alone.
Does this need an Oura subscription?
Vitra itself is a one-time purchase with no subscription of its own. It reads HRV through Oura's API, though — and since late 2025 Oura requires an active Oura Membership for API access on Gen 3, Ring 4 and Ring 5 (Gen 2 is exempt). So on those rings you need an active Membership for Vitra to sync. Anything already imported stays on your machine regardless.
Where is the analysis done?
On your machine. Your HRV history and baselines live locally — nothing is sent to a server.
Try Vitra with your Oura Ring

Local AI on your Mac or PC. One-time purchase, 7-day trial, no Vitra subscription.

Download Vitra →
See also
Best wearable for HRVOura sleep analysisOura readiness, explainedHow Vitra computes everything