Waking from deep sleep can leave you foggy for up to an hour. RemWake follows your sleep through your Apple Watch and rings during light sleep, inside a window you choose. It never rings later than your deadline.
The science
That heavy feeling has a name: sleep inertia. Research suggests it depends largely on which sleep stage your alarm interrupts.
performance when woken from deep sleepin one study
woken from light sleep, as sharp as someone already awakethat's the moment RemWake waits for
Stampi, cited in Hilditch & McHill, Nature and Science of Sleep (2019). Sleep inertia typically lasts 15–60 minutes and can persist longer (Sleep Foundation).
How it works
Sleep moves in cycles of roughly 90 minutes, drifting from light sleep into deep sleep and back again. An alarm that lands at the bottom of a cycle can leave you foggy for a while. One that lands near the top lets the morning begin gently.
"Up by 7:00, anytime after 6:30." You choose the latest you can wake and a 10, 20, or 30-minute window before it.
Overnight, RemWake reads heart rate and motion from the Apple Watch you already own. Everything is processed quietly, on your own devices.
When light sleep appears inside your window, haptics start at a whisper and gently build. If no good moment comes along, it simply rings at your deadline.
The wake
Haptics begin at whisper strength on your wrist and build gently over a minute or so. Sound arrives late and low, or not at all. A silent wrist-only wake lets your partner sleep on.
Why RemWake
Your deadline is protected by a guaranteed system-level alarm that fires even in Silent mode and Focus. The smart part can only ever wake you earlier, never later.
There's no new tracker to buy and no extra gadget to charge. Any Apple Watch on watchOS 26 or later is enough.
RemWake has no accounts, no servers, and no cloud. Your sleep data stays on your Watch and iPhone, where it belongs.
Wake to Watch haptics alone while your partner sleeps on. It might be the kindest alarm two people can share a bed with.
Each morning you'll see when you woke, where that landed in your cycle, and, when it happens, that it was a deadline wake instead. An alarm earns trust by telling the truth.
Apple already tracks your sleep beautifully. RemWake focuses on a single moment, the wake, and every feature serves it.
Every morning
You surfaced at 6:47, during light sleep, near the top of your fourth cycle. On mornings when no light-sleep moment appears, the report says so plainly: "We woke you at 7:00 sharp." An alarm you can trust is one that tells you the truth.
Questions
Then it rings at your deadline. The guaranteed alarm is scheduled the moment you go to bed and fires from your iPhone no matter what happens overnight, even if your Watch battery dies or the watch comes off. Smart when it can be, punctual always.
No, and that's deliberate. Waking mid-REM can be disorienting too. RemWake aims for light sleep between cycles, when your body is already drifting toward the surface on its own.
Overnight sensing is designed to stay modest, and the app tells you the real number each morning rather than hiding it. Charge before bed and you're set. Exact figures are coming out of our beta, and we'll publish them.
An iPhone on iOS 26 or later and an Apple Watch on watchOS 26 or later, worn to sleep. That's the whole setup. A phone-only mode is on the roadmap.
It stays on your devices. RemWake has no accounts and no server. Health data is read to score your wake timing each morning and never written anywhere else. Details are in our privacy policy, which is a short read.
No. Apple already tracks your sleep well. RemWake focuses on the wake, and every feature serves waking up clear-headed.
Early access
Join the waitlist for early access. Beta testers get 3 months free at launch.
You're on the list. We'll wake you when it's time, gently, in your inbox.