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Cortisol+
The cortisol tracker your Apple Watch was missing
Real-time cortisol estimation powered by Apple Watch biometrics. See your stress, sleep, and recovery — decoded.
Top comment
Hey Product Hunt 👋 I built Cortisol+ because I was burning out and my Apple Watch wasn't telling me. It tracked my heart rate, my sleep, my workouts — but the signal I actually wanted to understand was cortisol. And no consumer wearable measures cortisol directly. It's a hormone, not an electrical signal. Here's the thing though: Apple Watch already collects every biometric that's correlated with cortisol. HRV. Sleep stages. Resting heart rate. Wrist temperature. Recovery balance. The data is sitting there. Cortisol+ combines those signals into a continuous cortisol-pattern estimate, calibrated to your personal baseline. You get a 0–100 cortisol score, updated in real time, mapped to four levels (Low, Normal, Elevated, High) — visible on iPhone and on the Watch face itself. A few things I'm proud of: → It's honest about what it is. We don't measure cortisol — we estimate the pattern. Every page on cortisolplus.com says so. No "AI-powered" smoke. → Sleep × cortisol analysis. Most stress apps treat sleep as a separate metric. We treat it as the biggest driver. You see exactly which nights spike your next-day cortisol. → Zen mode with measurement. Guided breathwork that shows you the HRV recovery curve after each session. You see the cortisol drop, not just hope for it. → On-device privacy. Biometric data stays on your iPhone. We don't sell it. No Meta pixel, no Google Analytics in the app. → Free to download. Premium subscription for advanced features, but the core cortisol score is free. Where we are: 5,000+ users, 4.9 stars across 16 ratings, available in 171 countries. A few things I'd love feedback on from this community: 1. If you have an Apple Watch and try the app, does the cortisol score actually match how you feel that day? 2. What's the one cortisol-related question you've always wanted answered but no tool has helped with? 3. For the iOS devs here — anything you'd build differently with the HealthKit data we're using? Genuinely excited to be in front of this community. Will be in the comments all day to answer anything. Thanks for taking a look 🙏 — Mikah Founder, Cortisol+ (Elevated Systems LLC) cortisolplus.com
About Cortisol+ on Product Hunt
“The cortisol tracker your Apple Watch was missing”
Cortisol+ was submitted on Product Hunt and earned 3 upvotes and 1 comments, placing #150 on the daily leaderboard. Real-time cortisol estimation powered by Apple Watch biometrics. See your stress, sleep, and recovery — decoded.
On the analytics side, Cortisol+ competes within Apple — topics that collectively have 15.5k followers on Product Hunt. The dashboard above tracks how Cortisol+ performed against the three products that launched closest to it on the same day.
Who hunted Cortisol+?
Cortisol+ was hunted by Mikah Albertson. 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 Cortisol+ including community comment highlights and product details, visit the product overview.