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HRV Flow
Free daily condition score for Apple Watch — and your iPhone
A free daily condition score for Apple Watch — no extra wearables, no subscriptions. HRV Flow turns your wake-up HRV, resting heart rate, and sleep into a 0-100 score every morning. Score insights tell you what changed: "Wake-up HRV was low" or "Sleep was short." Score low? Try a 1-minute breathing exercise on Watch or iPhone. Watch your heart rate drop from 82 to 68 bpm. Score → Breathe → See the change. 11 breathing patterns, recommended by time of day. All data stays on your device.
Hi Product Hunt! 👋
I was frustrated that getting a daily recovery score required
Whoop ($30/mo) or Oura ($6/mo) — when my Apple Watch already
collects all the data needed.
So I built HRV Flow. It turns your wake-up HRV, resting heart
rate, and sleep duration into a single 0-100 score every morning.
Three things that make it different:
1. SCORE INSIGHTS — Not just a number. The app shows you why your
score changed: "Wake-up HRV was low" or "Sleep was short (6h)."
You learn what affects your recovery.
2. BREATHING THAT WORKS — When your score is low, do a 1-minute
breathing exercise on your Watch or iPhone. Watch your heart
rate drop from 82 to 68 bpm in real time. That instant feedback
is what makes the habit stick.
3. PRIVACY FIRST — Everything runs on-device. No external servers.
No subscriptions. No ads.
Built solo from Singapore over the past year. Would love feedback,
especially from Apple Watch users who've tried Whoop or Oura.
What would you want to see next?
About HRV Flow on Product Hunt
“Free daily condition score for Apple Watch — and your iPhone”
HRV Flow was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #85 on the daily leaderboard. A free daily condition score for Apple Watch — no extra wearables, no subscriptions. HRV Flow turns your wake-up HRV, resting heart rate, and sleep into a 0-100 score every morning. Score insights tell you what changed: "Wake-up HRV was low" or "Sleep was short." Score low? Try a 1-minute breathing exercise on Watch or iPhone. Watch your heart rate drop from 82 to 68 bpm. Score → Breathe → See the change. 11 breathing patterns, recommended by time of day. All data stays on your device.
On the analytics side, HRV Flow competes within Health & Fitness, Wearables and Apple — topics that collectively have 280.3k followers on Product Hunt. The dashboard above tracks how HRV Flow performed against the three products that launched closest to it on the same day.
Who hunted HRV Flow?
HRV Flow was hunted by Koji Taniguchi. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of HRV Flow including community comment highlights and product details, visit the product overview.
Koji Taniguchi