How can I set Apple Watch alarm for REM cycle alert?
I want to set my Apple Watch / iPhone alarm to wake me up when I finish 1 or 2 REM cycles. How can I do it?
[Re-Titled by Moderator]
iPhone 16 Pro, iOS 18
Question marked as
The Apple Watch does not have the native ability to do this. Here’s what ChatGPT has to say about the matter and third party apps that do have this capability.
💡 Apple Watch/iPhone Setup Tips
Option 1: Manual Alarm Based on Sleep Time
- Estimate your sleep start time.
- Use the Clock app to set a custom alarm at:
- Sleep time + 1.5 hours (1 cycle)
- Or + 3 hours (2 cycles)
Option 2: Use a Smart Alarm App (More Accurate)
Apple’s native alarm app doesn’t adjust for sleep stages. Try these Apple Watch-compatible apps:
- Sleep Cycle (iPhone + optional Watch companion)
- AutoSleep (detailed sleep analysis)
- Pillow (Apple Watch native, good UI)
- Sleep++ (free, more basic)
These apps track your sleep stages and can wake you up during light sleep, close to your desired wake window (like 6:30–7:00 AM).
Credit to ChatGPT assistant.