Is my sleep data private?

Yes. Audio is analysed on your device, your data is never sold or shared with third parties, there is no ad tracking, and you can delete everything from inside the app.

SleepTrace — Understand and improve your sleep. No wearable.

Q: Do I need a wearable to use SleepTrace?

No. SleepTrace uses only your iPhone's microphone. You set the phone on your nightstand and start tracking — there is no watch, ring or band to wear or charge.

A tired man on the left and a person sleeping soundly on the right with a rising 97% indicator

The problem

8 hours of sleep.
Still exhausted.

You go to bed on time. You sleep through the night. And you still wake up foggy — wondering what's actually going on while you're out. A number of hours doesn't tell you whether you reached deep sleep, how often you stirred, or what woke you at 3 a.m.

SleepTrace was built for exactly that person: someone who sleeps enough, feels it isn't working, and wants to understand it — not guess.

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phases detected:
Awake · Light · Deep · REM

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resolution —
a read every half minute

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wearables or
extra hardware

The difference

From guessing to knowing.

Without SleepTrace

You're flying blind.

Eight hours in bed — and no real idea what happened in them.

A number of hours that says nothing about quality
No clue why you wake up tired or what woke you at 3 a.m.
You change things at random and hope something sticks
Another device to wear, charge and forget

With SleepTrace

You can finally see it.

One night of audio, turned into a clear, honest picture.

Your real phases — and whether you reached deep sleep
The snoring and breathing you never knew about
One specific, science-backed thing to change tonight
Nothing to wear — just your iPhone on the nightstand

How it works

One night of audio. One clear answer.

Set it on the nightstand and start. SleepTrace listens, analyses on your device, and hands you one insight that actually explains your night.

1

Record

Your iPhone records the night through its microphone. No watch, no band, no chest strap — the phone on your nightstand is the entire setup.

2

Analyse

On-device machine learning turns the audio into mel-spectrograms and classifies your sleep with CoreML — phase by phase, every 30 seconds.

3

Understand

In the morning you get the picture: your phases, the sounds from the night, and the one pattern worth knowing — not twelve metrics you have to decode.

Features

Everything your night was hiding.

Sleep phase graph with deep, light, REM and awake stages

Sleep phases

See the phases, not just the hours.

Awake, light, deep and REM — classified every 30 seconds and drawn as one readable graph. Finally see whether those 8 hours included the deep sleep that actually restores you.

Hypnogram for every night
Deep-sleep and REM totals at a glance

Sound clips detected during the night including snoring

Sound detection

Hear what you never knew you did.

SleepTrace catches and labels the sounds of your night — snoring, coughing, talking, ambient noise — each with a decibel reading and a moment on the timeline you can play back.

Snoring, coughing, noise — categorised
Decibel level for every clip

Smart alarm

Wake up in the right moment.

Set a window instead of a fixed time, and SleepTrace wakes you in your lightest sleep — so you start the day clear-headed instead of dragged out of deep sleep by an alarm.

Wakes in your lightest window
Sleep sounds to drift off to

Stats & trends

Watch the patterns emerge.

A calendar, phase breakdowns, and weekly and monthly trends turn single nights into a story. See what your sleep does over time — and what actually moves it.

Weekly & monthly trends
Reads & writes Apple Health sleep data

Sleep plan

A rhythm you can actually keep.

Build a personal Monday-to-Sunday schedule with a target you set yourself. SleepTrace keeps your alarm in sync — gentle structure, no rigid rules.

Per-day bedtimes & wake times
Auto-syncs your smart alarm

Insights

The one thing worth knowing.

Each morning, SleepTrace surfaces what stood out — a snoring spike, a drop in efficiency, a recurring wake-up — in plain language. Signal, not a wall of numbers.

Plain-language nightly insights
Streaks & Live Activity on the Lock Screen

Even more

The depth a data-minded sleeper wants.

Beyond phases and sounds, SleepTrace quietly does a lot more for your night.

Sleep apnea screening

Detects breathing pauses and reduced breathing through the night and flags possible sleep apnea.

Screening hint · not a diagnosis

Apple Watch metrics

Pair an Apple Watch to add heart rate, HRV, blood oxygen and breathing rate to your night.

Premium

Morning mood check

A two-second check after waking reveals how your sleep really affects how you feel.

Science-backed tips

Recommendations grounded in sleep medicine and CBT-I — small, specific steps, not vague advice.

Streaks & milestones

Keep a tracking streak alive, with milestones at 3, 7, 14, 30, 60 and 100 nights.

Sleep sounds

Drift off to calming soundscapes with an auto-off timer that stops once you're asleep.

Reliable smart alarm

Wakes you at the lightest moment — and still sounds in silent mode and Do Not Disturb.

Live Activity

See tracking on your Lock Screen and Dynamic Island, all through the night.

Apple Health sync

Reads and writes your sleep data with Apple Health, so everything lives in one place.

The on-device machine-learning model that reads your sleep

Is it accurate?

Yes — and here's exactly how.

The fair question every data-minded person asks: can a microphone really read your sleep? It can — because your body changes how it sounds through the night.

1

Listen

Your iPhone captures the night — breathing, movement and the micro-sounds of sleep.

2

Turn sound into a fingerprint

Every 30 seconds becomes a mel-spectrogram — a visual signature of that moment's sound.

3

Classify on device

An Apple CoreML model, trained on labelled sleep data, reads each fingerprint as awake, light, deep or REM.

4

Cross-check with your watch

Pair an Apple Watch and SleepTrace blends in heart rate, HRV and blood oxygen for an even sharper read.

Why no wearable wins

The insight of a wearable.
Without the wearable.

You already own the only device you need.

SleepTraceiPhone only Wearableswatch / ring Basic appsmotion only

Nothing to wear or charge

Sleep phases — Awake · Light · Deep · REM

Hears snoring & saves sound clips

Breathing & apnea screening

Sound levels in decibels

Science-backed recommendations

Private — analysed on your device

Typical cost €6.90/mo €200–400+ varies

What you'll understand

The kind of things people realise
on their very first night.

I sleep 7.5 hours — but only 45 minutes of deep sleep.

Phase breakdown

I snore 23 times a night and had no idea.

Sound detection

I wake up at 3 a.m. almost every night — there's a pattern.

Trends over time

When I'm asleep before 11, I get 30% more deep sleep.

Insights

A glowing shield representing privacy and on-device data

Your data stays yours

Private by design.
Not by promise alone.

The most personal recording there is — you, asleep — should never leave your control. SleepTrace is built so it doesn't have to.

No third-party sharing

Your sleep data is never sold or handed to advertisers or data brokers. Full stop.

Audio analysed on device

The night's audio is processed locally on your iPhone — the analysis happens where the recording lives.

Delete anything, anytime

Remove individual nights or wipe everything from inside the app whenever you want.

No ad tracking

There's no advertising network inside SleepTrace — and no tracking model behind it.

A woman waking up rested and stretching in morning light

Wake up clearer

Start the day on the right side of sleep.

Being torn out of deep sleep is half of why mornings feel rough. SleepTrace's smart alarm finds the lightest moment inside your wake-up window and lifts you out gently — the difference between groggy and ready.

It's a small change with an outsized effect: the same alarm, timed to how you're actually sleeping.

Early users

What people noticed first.

"First morning I understood why I felt wrecked — barely any deep sleep, even with eight hours in bed. No watch needed. That sold me."

SK

Sarah K.Beta tester

"Heard myself snore for the first time. My partner had been telling me for years — now I had it on a timeline with the decibels. Eye-opening."

MT

Marcus T.Beta tester

"The smart alarm is the part I didn't expect to love. Waking in the right window genuinely changed how my mornings feel."

LM

Lisa M.Beta tester

Pricing

Free to start. Premium from €6.90/mo.

Everything you need to understand your night is free. Premium unlocks unlimited sounds, every insight, trends and more.

See full pricing →

Questions

Good to know.

Correct. SleepTrace uses only your iPhone's microphone. You set the phone on your nightstand and start tracking — there's no watch, ring or band to wear or charge.

The app turns the night's audio into mel-spectrograms and runs them through an on-device CoreML model that classifies your sleep — awake, light, deep or REM — every 30 seconds. More in how sleep phases work.

No. SleepTrace is a consumer wellness app for understanding your sleep — it does not diagnose or treat any condition. The snoring and breathing features are for awareness, not medical screening. If you have a health concern, please speak with a doctor.

Tracking is designed to run overnight with your phone on the charger, as most people keep it anyway. Recordings are managed efficiently, and you can delete clips and nights at any time to free up space.

Yes. Audio is analysed on your device, your sleep data is never sold or shared with third parties, there's no ad tracking, and you can delete everything from inside the app. See our privacy policy.

SleepTrace launches on iPhone first. Join the waitlist and you'll be among the first to know the moment it's live on the App Store. An Android version is on the roadmap — add your email to the Android list in the footer and we'll keep you posted.

Be first in line

Understand your sleep from the very first night.

Join the waitlist and we'll email you the moment SleepTrace is live on the App Store.

You're on the list.We'll be in touch at launch. Read our sleep guides while you wait →

Download on theApp Store Soon Coming soon toGoogle Play

8 hours of sleep.Still exhausted.