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?

It feels like a huge obstacle has been cleared away—everything is crystal clear now, especially when the stress is presented as concrete numbers. The breathing technique rounds out this process perfectly. What surprised me was that when I used this breathing technique while using the restroom, I immediately felt the blockage clear up! Amazing!!!

@info_magictouchedit Thank you so much! 🙏 The restroom breathing story made my day — I hadn't even thought of that use case! This is exactly what I hoped for: people finding their own moments for it.

Glad the numbers make it feel tangible rather than abstract. That was my biggest design goal.

HRV Flow

Free daily condition score for Apple Watch — and your iPhone

Free daily condition score for Apple Watch — and your iPhone