Never be late to
a meeting again.
Perimeter glows your screen edges as meetings approach — a gentle, impossible-to-miss reminder that lives in the background.
Free · macOS 14+ · 14-day Pro trial included
How it works
30 min out
A gentle green glow appears around your screen.
15 min out
The glow warms to yellow. Time to wrap up.
5 min out
Orange. An overlay shows the event name — snooze or dismiss.
Right now
Red. "Time to go." You won't miss it.
Eight glow patterns
Solid is free. Pro unlocks Gradient, Comet, Wave, Marquee, Dot & Dash, Segments, and Corners.
Wave
Gradient
Subtle
Comet
Built for how you actually work
Calendar-aware
Reads your macOS Calendar and Reminders automatically. Works with Fantastical, BusyCal, Google Calendar, Outlook — anything that syncs to macOS Calendar.
Eight glow patterns
Gradient, Corners, Comet, Wave, Marquee, Dot & Dash, Segments, Solid. New patterns added over time.
Multi-monitor
Pro users can have Perimeter glow every screen in their setup simultaneously.
Private by design
All event data stays on your Mac. No cloud sync, no analytics, no account required.
Lightweight
Lives in your menu bar. Zero impact on your workflow until you need it.
Per-event styles
Pro users can assign a unique glow pattern and color to individual calendar events.
Simple pricing
- Solid glow pattern
- 1 calendar
- Primary monitor
- 14-day Pro trial included
- All glow patterns & animations
- Calendar Mode
- Unlimited calendars & reminders
- Multi-monitor support
- Regular new pattern drops
- Everything in Pro
- Pay once, keep forever
- All future updates included
✦ Every download includes a free 14-day Pro trial — no credit card needed.