Heart
An HRV tracker that actually interprets what it sees.
Most apps show you HRV as a single number and call it a day. Wellness Project reads it against your 30-day baseline, your training load, your sleep, and your alcohol intake, then tells you whether to push or pull back today.
Free Basic · Founder Pro $4.99/month through October 15
Independently security verified
What's inside
HRV interpretation that doesn’t require a degree
Daily HRV
Pulled from Oura and Fitbit directly, and from Apple Watch (or any other wearable that writes to Apple Health) on iOS. Plotted against your personal 30-day baseline so today’s reading has meaning.
Resting heart rate
Same source, plotted with HRV inverted. RHR up + HRV down = stressed; RHR down + HRV up = recovered.
Recovery score in Fit Score
Your daily Recovery component is built from HRV and RHR vs your 30-day baseline (HRV weighted slightly heavier). It sits inside the Fit Score alongside Train, Sleep, Fuel, Steps, and Wellbeing.
Variance & trend
7-day rolling baseline, 30-day baseline, and the gap between them. A widening gap is when something is changing, and Max will say so.
Cross-correlation insights
"On nights you sleep under 7h, HRV drops 4ms vs baseline. Eleven of those in the last 30 days." Real Max-style replies.
Multi-device dedup
HRV methodology differs across devices. When multiple sources log the same day, Wellness Project picks one and dedupes the rest so the trend stays comparable.
In the app
The single most useful daily metric, finally usable
HRV is the cleanest single proxy for autonomic-nervous-system state, the gap between sympathetic stress and parasympathetic recovery. Reading it well means knowing your personal baseline, what training you did yesterday, what you ate, what you drank, and how you slept.
Wellness Project does that read automatically. The biohacker, Max Kline, reads HRV against your training load, alcohol, sleep, and stress in one pass. The output isn’t “HRV is 47, that’s good or bad?” It’s “HRV ran 8% below your 30-day baseline three days running, Tuesday late HIIT and last night’s alcohol both fit; cut one or take a true rest day.”
Same data feeds Evelyn’s longevity reads (lower HRV is broadly associated with cardiovascular risk in observational research), Elias’s training decisions (low HRV days bump easy runs), and Coach Jamie’s workout-load suggestions.
From the blog
Related posts from the crew
Max Kline · Jul 26, 2026
Does Drinking Earlier in the Evening Actually Protect Your Overnight Heart Rate?
A 20,968-person wearable study found each extra drink tracked with about 2.8 bpm higher overnight resting heart rate and 3.8 ms lower HRV,…
Atlas Mercer · Jul 23, 2026
Can You Trust Your Oura or Whoop Readiness Score?
When five wearables were tested against a clinical ECG across 536 nights, the raw nocturnal heart rate and HRV signals proved accurate to …
Max Kline · Jul 17, 2026
Does Taking Ashwagandha Actually Lower Your Cortisol, or Is That a Myth?
Ashwagandha is the supplement everyone's stressed friend recommends, and the pitch is always the same: it drops your cortisol. That's a sp…
FAQ
FAQ
Apple Watch vs Oura, which is best for HRV?
Is HRV actually predictive?
Why does my HRV crash on weekends?
More
Keep exploring
Feature
Workout analysis
Analyze imported workouts with duration, distance, pace or speed, heart-rate traces, zones, effort, load, recovery, and device context when available.
Read moreLearn
Heart Rate Zones During Exercise
Heart-rate zones turn a changing pulse into useful intensity bands. They help separate easy aerobic work from moderate, threshold, and very hard efforts, but the exact boundaries depend on the method and the person.
Read moreFeature
Running
Track imported runs with pace, splits, cadence, power, elevation, heart-rate traces and zones, Training Load, history, trends, and Elias coaching.
Read moreFeature
Cycling
Track rides, distance, speed, cycling goals, Fit Score, Training Load, heart rate, rich imported workout detail, dashboard trends, Train, and AI coaching.
Read moreCoach
Meet Max Kline
The biohacker who reads HRV like a stock chart. Engineer-minded, allergic to over-interpretation.
Read moreIntegration
Oura Ring
The richest sleep + HRV dataset of any consumer wearable. Fully integrated.
Read moreUse case
For biohackers
How quantified-self users interrogate HRV alongside sleep, CGM, and supplements.
Read moreComparison
Best AI fitness app
Why a coached app beats raw trackers.
Read moreStart tracking. Talk to your specialists today.
Free Basic · Founder Pro $4.99/month through October 15
Wellness Project is informational software, not a medical product. AI advisors do not diagnose, treat, or prescribe; for anything clinical, consult a qualified clinician.
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