Read your wrist sensors beside your snoring, and connect any wearable through Apple Health.
Snore Timeline listens through your phone. An Apple Watch adds a second layer on top of that, with heart rate, heart rate variability, blood oxygen, and more, measured at your wrist while you sleep. This page covers the watch app, the live view during a recording, the biometrics that sit next to your snoring in the morning, and how Apple Health ties it all together so wearables like Oura, Whoop, Garmin, and Ultrahuman can join in.
Every number on this page comes from your watch's own sensors, read through Apple Health. They're shown for your awareness and for sharing with a doctor. They aren't a medical evaluation, and Snore Timeline doesn't diagnose any condition.
Snore Timeline comes with an Apple Watch app bundled into the iOS app, so there's nothing extra to buy or install. You can start and stop a recording from your wrist, which saves reaching for the iPhone once you're already in bed. The watch app is iOS only.
Besides the controls, the watch gives you a few places to see your night:
The dashboard opens on last night. You can swipe back through the last 60 nights to revisit any morning, then swipe vertically through that night's pages: score, recovery, vitals, stages, and weekly balance. A "jump to today" control brings you back to the most recent night in one tap.
The complications come in a few shapes. The Sleep Score widget comes in circular, corner, and rectangular styles and shows last night's score in a color gauge. The rectangular one pairs the score with your recovery status, like "6h 42m · Well Recovered". An inline widget reads "Score (84) ยท (6h 42m)" with last night's score and duration, or "Recording sleep" while a session is running. During a session, a Live Activity shows up in your Apple Watch Smart Stack with a red REC indicator, a live timer, and either "Listening" or a running count of detected signals.
While a recording is running and your Apple Watch is on, the watch app shows live readings from your wrist. You get your current heart rate and recent HRV samples, with a rolling view of roughly the last 10 to 30 minutes of heart rate.
When a session starts, the app looks back a short way for your most recent heart rate so it can show a value straight away instead of waiting for the next sensor reading. Apple Watch takes HRV readings rarely, often only a handful across a whole night, so the app may show a recent baseline value until the session produces a new one.
The live view also tracks progress toward a full night. A progress bar fills as you sleep, with the time still to go underneath, like "2h 32m to a full night", and your current heart rate and recent HRV below that. Until the app detects that you've fallen asleep, it reads "Settling in" instead of a time.
The same Live Activity shows in your iPhone's Dynamic Island and on the Lock Screen. Siri, Shortcuts & Widgets covers the Live Activity and widget options in more detail.
A paired watch can do more than take readings. Two features use gentle wrist taps, and both work with the phone locked and the watch app closed:
The wrist options only show up in Settings while a watch is paired, and both feel much firmer if you set the watch's haptics to Prominent in the Watch app.
If you wear your Apple Watch to bed and have Apple Health turned on, Snore Timeline reads six kinds of data your watch records overnight and shows them next to your snoring: sleep stages, heart rate, heart rate variability (HRV), respiratory rate, blood oxygen (SpO2), and wrist temperature. Combined with the audio analysis, you get a fuller picture of the night. The watch is optional. The app works from audio alone if you don't have one.
On both the phone and the watch, these readings live in a nightly biometrics card. The watch shows the headline numbers, and tapping through opens the detail screens:
On the phone's biometrics card, each metric gets a rating like Excellent, Good, Typical, Low, or Elevated, plus a small sparkline so you can see how it moved across the night. Resting heart rate and HRV earn Excellent when they clearly beat your own baseline. Breathing rate tops out at Typical, since an unusually low or high breathing rate isn't a win. The ratings are informational and never a diagnosis.
Wrist temperature needs iOS 16 or later and an Apple Watch Series 8 or newer. On older watches that don't record it, the app leaves it out and everything else keeps working. The temperature value only updates when new readings come in, so a partial sync won't replace a complete reading you already have.
Your full sleep data may not be there the moment you wake up. Apple Watch usually finalizes its sleep staging 1 to 3 hours after you wake, so the complete breakdown can arrive later. Snore Timeline watches Apple Health in the background and syncs on its own once the watch pushes the finalized stages, even if you never open the Health app. Your sleep score and home screen widgets refresh within about a minute of the watch's morning sync, without you opening the app. To refresh sooner, use the Re-import history button in Settings under Apple Health.
Next to the sleep score, the morning dashboard shows a recovery score, a read on how well your body recovered overnight, built from the wrist vitals above. It shows as a five-segment charge bar with a one-word verdict, from Poor to Excellent, plus a short summary of what drove the night. Since it draws on HRV, resting heart rate, breathing rate, blood oxygen, wrist temperature, and time asleep, it needs a wearable feeding Apple Health. Without one, the watch shows the sleep score by itself.
Each vital gets its own detail page too. Swipe in and you see that metric charted across the night as a sparkline, its average and range, a trend against your recent nights, and a plain-language read on what the number means. The verdict bands and the full formula, including how a short night caps the score, are on the Sleep Score & Insights page. The recovery score is for your own insight. It isn't a clinical readiness measure.
The Sleep Bank on the watch tracks how much sleep you've banked or borrowed over the past week. It looks at your trailing 7 nights and compares each one against a goal of 7 hours. Nights above the goal build a surplus. Nights below it build a deficit. The screen adds those up into one balance, so you can see whether the week left you ahead or behind.
The bar chart plots one bar per night across the week against the 7-hour goal line, and below it you get your average time asleep and the resulting Sleep Deficit or surplus. Only nights with sleep data count, so a week with a few missed nights still reads correctly against the nights you did record.
For each night's duration, the Sleep Bank prefers the sleep time Snore Timeline measured from your audio recording. On nights when you wore your watch but didn't run a recording, or when you use a ring or band instead, it falls back to the sleep duration from Apple Health. So the Sleep Bank stays complete whether you record every night, wear a wearable, or mix the two.
Apple Health is the bridge that lets Snore Timeline read your watch and write its own results back. To turn it on, open Settings in Snore Timeline, find the Health Integration section, tap the Apple Health toggle, and approve the permissions sheet iOS shows you. That one sheet covers everything the app reads and writes, with a checkbox for each data type, so you decide what to allow in one place. You can switch the toggle off at any time, which stops all reading and writing at once, and you can fine-tune individual data types later in the iOS Health app's privacy settings.
The first time you turn it on, the app imports your full sleep history from Apple Health, going back up to 2 years. A status line under the waveform shows the progress, "Importing sleep data...", then "Imported N nights" when it's done, so months of past nights are filled in from day one.
What Snore Timeline reads (measured by your wearable): sleep stages, heart rate, HRV, respiratory rate, blood oxygen (SpO2), and wrist temperature on supported devices.
What Snore Timeline writes (all from your overnight audio, analyzed on the device): sleep analysis (time asleep and time in bed), sleep stages (light, deep, REM, and awake), and respiratory rate during sleep, stored in breaths per minute as the average across the night's samples. You can review this list in Settings under Apple Health. The app only writes its own analysis. It never writes data that came from other apps or devices, and it never overwrites readings from your Apple Watch or other wearables.
To bring in older history, tap Re-import history in Settings under Apple Health. It pulls every available night from all your sources, going back up to 2 years, and fills the gaps without overwriting what you already have. When it's done, the app shows a short summary, for example "imported 12 nights from Apple Watch, Apr 1 to May 30". If it finds no sleep data, it tells you that too.
Synced data can change your sleep score. When Snore Timeline syncs from Apple Health, any night that also has a recording gets re-analyzed so the score can use the deep and REM stages from your wearable, which measures those stages more accurately than audio can. A night's score may shift on its own once your watch finishes its staging and that data reaches the app. Without a wearable, the app uses its own breathing and movement estimates. The Sleep Stages page explains how those work.
The dashboard also shows a hypnogram for the night, a band that maps when you moved through awake, REM, light, and deep, with the time you spent in each. When a night has data from more than one source, Snore Timeline keeps each source's stage timeline separate so you can compare them side by side.
Apple Watch isn't the only wearable Snore Timeline can read. Any device that writes its sleep data to Apple Health can feed the app, including the Oura Ring, Whoop, Garmin, and others. Snore Timeline only reads what those devices have written. It never writes data on their behalf. If a night has data from more than one source, each source's sleep stage timeline stays separate so you can compare them instead of getting a blend.
If you turn on Apple Watch sync, Snore Timeline shares your recorded sleep data with the app on your own Apple Watch so you can see it there. That goes through Apple's own device-to-device sync. There are no Snore Timeline servers for it to go to. Everything the app reads from other wearables comes through Apple Health, and only after you allow it. The Privacy Policy has the full picture.
Whether you wear a watch, a ring, a band, or nothing at all, the recording itself works the same way. The wearable adds context on top of the audio. To get the most out of the combination, the Get Deeper Sleep Data guide walks through connecting a wearable and reading the night you get back.
