a tiny, open-source mac app that actually makes you rest your eyes.
every 20 minutes it blacks out your screen for 20 seconds and nudges you to look about 20 feet away, then hands it right back. it's the 20-20-20 rule (what eye doctors recommend for screen strain), on autopilot.
download for mac → · free · macOS 13+
i stare at a screen ~10 hours a day and my eyes were wrecked, so i built this. the break is a plain black screen on purpose: the whole point is to look away from the display, not at a pretty one. there's soft ambient sound too.
first launch: horizon isn't notarized yet, so macOS says "can't be verified." click Done, then open System Settings → Privacy & Security and hit Open Anyway. just once.
it's a normal xcode project, takes a minute:
git clone https://github.com/agamjn/Horizon.gitopen Horizon/Horizon.xcodeproj- set your signing team: the Horizon target → Signing & Capabilities → Team → your (free) Apple ID
- hit ⌘R. the Horizon icon shows up in your menu bar. that's it.
issues and PRs welcome. it's a small, heavily-commented codebase. PLAN.md has the architecture, TODO.md the progress.
MIT © 2026 agam jain