A family playing together, smiling and at ease

A person asleep wearing an Apple Watch, beside a SleepSafe readout of a night terror showing heart rate, acceleration, rotation and the SleepSafe risk line.

A child's bedroom at night, calm and secure.

A woman sleeps peacefully on her side in the early morning light, wearing a smartwatch on the wrist resting on her duvet.

Better nights.Better lives.

SleepSafe detects nightmares on your Apple Watch and gently guides you back to peaceful sleep.

25,000+ hours monitored 300+ monthly users Free · No account · 1-min setup

How it works

Four steps. Zero effort.

Wear to bed

Activate monitoring with SleepSafe.

Auto-monitors

Heart rate, movement, and audio patterns are analyzed on-device.

Gentle intervention

Subtle haptic pulses guide you away from distress.

Morning insights

Review your night and track improvement over time.

Detects distress before you wake up

Machine learning analyzes heart rate patterns, movement, and audio signatures in real time, identifying nightmares as they begin, not after they've jolted you awake.

Heart rate variability analysis

Movement pattern recognition

Stress detection

Audio signature detection

SleepSafe app displaying real-time heart rate monitoring using physiological signals to detect and prevent nightmares.

Man sleeping peacefully at night while his Apple Watch shows SleepSafe monitoring his heart rate

Gentle enough to keep you asleep

Subtle haptic patterns on your Apple Watch guide your nervous system away from distress, without waking you up. Adjustable intensity lets you find your perfect level.

Understand your sleep, night by night

Morning reports show what happened, when interventions triggered, and how your sleep quality trends over weeks and months. Integrates with Apple Health.

SleepSafe sleep monitoring overview

SleepSafe detailed sleep insights

Real people. Real sleep.

Free of PTSD Nightmares!

"SleepSafe has truly changed my life. I struggle with PTSD related nightmares, and have never responded well to any medication. [..] I now don't dread sleep, and know that I am protected from nightmares [...]"

Zith L.App Store review

Such a great app for peace of mind at night!

"Really happy with life-changing app SleepSafe. Highly recommended to any parent dealing with night terrors!"

Sarah M.App Store review

My new nighttime companion

"If you struggle with any kind of parasomnia or sleep disturbance, I’d say you owe it to yourself to give SleepSafe a try."

Megan R.App Store review

Sleep through the night again!

"I have had a long term problem with sleep since I developed PTSD. [This app] is a great tool to help me reliably get through the night again."

X. B.App Store review

"The gentle interventions are perfect. I wake up feeling rested instead of anxious."

David L.Beta tester

Your data never leaves your device.

All processing happens on-device. No account. No recordings stored. Your sleep data stays in Apple Health, under your control.

Stories & Insights

View all stories

A tired man sits at a kitchen table at dawn, holding a mug of coffee in both hands and looking out of the window.

When Bad Dreams Become Nightmare Disorder

Occasional nightmares are a normal part of sleep. When they return week after week and start to shape your days, they can meet the definition of nightmare disorder. Here is where the line is, who is most affected, and how it shows up in the rest of your sleep.

A man asleep in bed at night, a round smartwatch on his wrist and his phone face down on the nightstand by a warm lamp.

SleepSafe Is Coming to Android

SleepSafe for Android phones and Wear OS watches is in a closed test on Google Play. Here is what it does, what you need, and how to join the test.

A woman sleeping peacefully in bed

The Other Side of the Bed

Most writing about nightmares focuses on the person having them. But there is almost always someone else in the room: a partner, a parent, a sibling. This is for them.

View all stories

Questions & answers

SleepSafe uses a sophisticated statistical model that analyzes three key indicators: heart rate from your Apple Watch, movement patterns during sleep, and audio signatures detected through secure on-device processing. This multi-sensor approach allows us to accurately identify distress during sleep.

No, our interventions are specifically designed to be subtle. We use gentle haptic patterns on your Apple Watch that guide your nervous system away from the nightmare without bringing you to full consciousness. And of course - you can always adjust the intensity in settings.

Detection runs on your iPhone and your Apple Watch. Audio is analysed on the device and never uploaded, and your sleep history lives in your own iCloud, not on SleepSafe servers. We don't even require an account to use the app.

Monitoring keeps your watch's sensors running all night, which uses battery. Charge your watch during your evening routine so it starts the night topped up, and keep your phone on charge if you use audio monitoring.

It's in a closed test. SleepSafe for Android phones and Wear OS watches is being tested on Google Play, and we're looking for testers. Here's how to join.

SleepSafe is designed to detect nightmares and night terrors/sleep terrors specifically. While it may help with sleep quality overall, it's not a medical device and doesn't diagnose or treat sleep disorders. Always consult your doctor for medical conditions.

They're actually quite different! Nightmares happen during REM sleep (late night), while night terrors occur during deep sleep (early night).

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