Your Samsung Galaxy Watch With CPAP Data

Reviewed by the CPAP Clarity editorial team. Last updated June 17, 2026.

Your CPAP machine is a precision flow instrument. It counts apneas, measures pressure, and logs every breath it delivers. What it cannot see is what your body did with the sleep that therapy made possible: whether you cycled through enough deep sleep and REM, whether your overnight oxygen held steady, and how settled your heart and breathing were through the night.

A Samsung Galaxy Watch measures those signals. As a wrist wearable its readings are estimates, not clinical instruments, but side by side with your CPAP data they add a layer of sleep-quality context a flow sensor alone cannot provide. And because CPAP Clarity reads every source in your browser, you can line up your CPAP, a pulse oximeter, and your Galaxy Watch on the same night without any of it leaving your device. This guide walks through how to export your Samsung Health data, what each number means, and how to read both streams together.

Medical disclaimer. Wearable readings are informational, not diagnostic. Samsung sleep stages, sleep score, SpO2, HRV, respiration, and snoring are wellness estimates, not clinical measurements. Do not change your CPAP therapy, medications, or lifestyle based on these numbers without talking to your sleep physician first.

Step 1: Understand What the Galaxy Watch Adds to CPAP Data

Your CPAP reports the mechanics of the night: apnea-hypopnea index (AHI), leak rate, pressure, and usage hours. If you want a refresher on the headline number, the AHI explainer covers it. Those numbers tell you whether the machine is doing its job. They do not tell you how rested you actually are.

A Galaxy Watch fills several gaps:

• Sleep architecture. How your night split between deep, REM, light, and awake. Unlike some wearables that only report totals, Samsung records a timestamped stage timeline, so CPAP Clarity can draw the stepped chart of how your night actually unfolded.
• Overnight oxygen. On Galaxy Watch models with the blood-oxygen sensor enabled for sleep, an estimated SpO2 average and low give a second, independent read alongside a dedicated pulse oximeter.
• Heart rate and HRV. Your sleeping heart rate and overnight heart-rate variability, a rough marker of how recovered your night was.
• Respiration and sleep score. Your average overnight breathing rate and Samsung's proprietary 0-100 sleep score.

None of these replace your CPAP data. Together with it, they turn "my AHI was fine" into a fuller picture of the night.

Step 2: Export Your Data From Samsung Health

Samsung Health keeps your history on your phone and in your Samsung account. You export it from inside the app, not off the watch directly.

1. Open the Samsung Health app on the phone your watch syncs to.
2. Open Settings (the gear or three-dot menu), then find Download personal data.
3. Confirm the request. Samsung gathers your history and saves it to your phone as a folder of files. A long history can be large, so give it a minute.
4. Move that folder, or a .zip of it, to the device you use for CPAP Clarity.

The export contains far more than sleep: steps, workouts, and other tracking all come along. That is fine. CPAP Clarity reads only the sleep-related files and ignores the rest.

Step 3: Import Your Samsung Export Into CPAP Clarity

On the CPAP Clarity dashboard, drag the Samsung Health folder onto the import zone. If you zipped it, you can drop the .zip instead; on a lower-memory phone the unzipped folder is the smoother path because the export can be large. CPAP Clarity recognizes it automatically and parses it in your browser.

Two things worth knowing about how the import works:

• Everything stays local. The export is read entirely in your browser. Nothing is uploaded, and there is no connection to your Samsung account. To refresh with new nights later, download your data again and drop it in again.
• Only your sleep is read. A Samsung Health export is large and full of data types CPAP Clarity has no use for. The import pulls out only the per-night sleep summaries, the stage timeline, and the related overnight signals, then leaves the rest untouched, so it stays fast and nothing extra is stored.

Step 4: Read the Sleep-Stage Chart

Once imported, open the Samsung page to step through your nights. The stage chart is the centerpiece: a stepped timeline of deep, light, REM, and awake across the night, built from the watch's own minute-by-minute staging.

Read it as a relative trend, not an absolute label. The watch estimates stages from movement and heart-rate pattern, while a sleep study scores them directly from brain and muscle signals. The two agree on the overall shape of a night but disagree on minute-by-minute scoring. What matters for a CPAP user is the pattern over several nights: a run of nights with very little deep or REM sleep, especially when they line up with high leak or high AHI on the CPAP side, is worth noticing even if the absolute minutes would not match a sleep lab.

Step 5: Read SpO2, Heart Rate, HRV, and Respiration

Below the chart, CPAP Clarity shows the night's other signals when the watch recorded them:

• SpO2. Average and lowest overnight blood oxygen, on models with the sensor enabled for sleep. This is a wrist estimate, not a calibrated medical oximeter, so treat a single low reading with caution. A pattern of low overnight oxygen is the part worth raising with your clinician, and a dedicated pulse oximeter is the better tool if you want to track it closely.
• Heart rate. Your average and lowest heart rate during the sleep window.
• HRV. Overnight heart-rate variability, which tends to be higher on more recovered nights. It is most useful compared against your own baseline, not against anyone else's number.
• Respiration. Your average overnight breathing rate.

Each card only appears when the watch actually recorded that signal for the night, so a sparse night shows fewer cards rather than blanks or zeros.

Step 6: Snoring and the Sleep Apnea Feature

Samsung Health can also estimate snoring, and newer Galaxy Watches offer a separate sleep-apnea screening feature. It is important to understand what CPAP Clarity does and does not do with each.

Snoring is detected by your phone's microphone when it sits near the bed during sleep. CPAP Clarity shows the total time Samsung flagged as snoring, with clear framing: it is Samsung's own microphone estimate, not an apnea count, not an AHI, and not a medical measurement. It can be a useful nudge ("a lot of snoring on the nights I skipped the mask"), nothing more.

Samsung's sleep-apnea feature lives in a separate Samsung Health Monitor app and is a regulated screening tool in the regions where it is offered. CPAP Clarity deliberately does not import or display that result. It is a distinct medical feature with its own meaning, and a screening result does not map cleanly onto a single sleep night. If you have used it, discuss the result with your doctor directly. On a CPAP, the number that matters for therapy is your machine's AHI, not a wearable's screen.

Step 7: Read Your Galaxy Watch and CPAP Together

The reason to bring the watch into CPAP Clarity is the join. Once both are imported, the dashboard lines up each Samsung night with the CPAP session on the same date.

That is where the value shows up. A night where your AHI looked fine but you still woke up tired reads differently when the watch shows fragmented sleep, little REM, and a dip in overnight oxygen. If you often have good numbers and still feel unrested, the good AHI but still tired guide walks through what to look at next. For how the Galaxy Watch compares with other sleep wearables, see the sleep-apnea wearables overview.

Step 8: Know the Limits

A Galaxy Watch is a wellness device, not a diagnostic one. Its stages, oxygen, HRV, and snoring are estimates that work best as trends you compare against your own baseline over time. They are a conversation starter with your sleep physician, not a replacement for the data your CPAP records or for a sleep study.

Used that way, the watch earns its place: it adds the sleep-quality half of the story your CPAP cannot see, and CPAP Clarity keeps the whole picture private on your own device.

Ready to try it? Open the dashboard and drop your Samsung Health export alongside your CPAP data.