About this app
Opsin syncs your day with the sun. Most health apps hand you more numbers. Opsin does the opposite — it tells you the one thing to do for your circadian rhythm right now, then shows you it worked in your own sleep and recovery. Light sets your body clock. Opsin sets your light. WHAT OPSIN DOES - Live sun times and your daily light windows — morning light, vitamin D window, blue hour, and bedtime, calculated for your exact location and updated automatically all year. - A real, dynamic dawn alarm — recalculates to civil dawn every night, so you wake into the light without ever resetting a thing. - See what morning light does to you — Opsin reads your sleep and HRV from Apple Health and reflects the difference light makes in your own body. - Jet-lag plans with exact clock times — shift your body clock before you fly, so you land already adjusted. - Your lights, automatically on sun time — optional HomeKit support. WHY IT MATTERS A regulated circadian rhythm is the foundation under sleep, energy, and mood. Instead of highlighting downstream problems, Opsin addresses the behavior at the root — and makes it effortless. PRIVATE BY DESIGN No account. No backend. Your health and location data are processed entirely on your device and never leave your phone. SUBSCRIPTION Opsin Premium unlocks every feature. $9.99/month or $79/year, each with a 7-day free trial. Payment is charged to your Apple ID; subscriptions renew automatically unless canceled at least 24 hours before the period ends. Manage or cancel anytime in your App Store settings. Opsin is a general wellness and educational tool. It is not a medical device and does not diagnose, treat, or prevent any condition. Consult a qualified professional for medical concerns. Scripture quotations taken from the New American Standard Bible® (NASB), Copyright © 1960, 1971, 1977, 1995 by The Lockman Foundation. Used by permission. www.Lockman.org Terms of Use: https://opsinapp.com/terms Privacy Policy: https://opsinapp.com/privacy
Latest release
What’s New
Opsin now runs on iPhones with iOS 18 and later — welcome to everyone who couldn't join us at launch. • A new introduction that shows you what Opsin does and why your body clock matters • Jet-lag plans rebuilt on the Eastman/Burgess light protocol — realistic shift rates, a progress ring that tracks how far you've re-timed, and an optional plan for the trip home • Guidance for setting up an evening red screen filter • Daily verses refined throughout True Alarm still requires iOS 26.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 20, 2026 · 2:24 PM Free
Screenshots
