# EMAY SleepO2 Oximeter Data With Your CPAP Bring your EMAY SleepO2 overnight oxygen into CPAP Clarity. Export the CSV or .spo2 file from the EMAY app and see it beside your CPAP nights, free and private. Source: https://cpapclarity.com/learn/emay-sleepo2-oximeter-data Published: 2026-10-20 Updated: 2026-10-20 Author: Brian C. Informational, not medical advice. Talk to your sleep physician before changing your therapy, pressure, mask, or medications. If you sleep with an EMAY SleepO2 on your wrist, CPAP Clarity can read its overnight oxygen and pulse and line them up with your CPAP nights. Export the night from the EMAY app as a CSV file or as a .spo2 file, drop either one onto the [CPAP Clarity home page](https://cpapclarity.com/), and the night appears by date beside your therapy data. It is free, needs no account, and the file is read in your browser without being uploaded. > **Medical disclaimer.** A consumer pulse oximeter is not a diagnostic device, and EMAY itself says the SleepO2 is intended for reference only, not for medical or diagnostic use. Readings can be thrown off by movement, cold fingers, nail polish and skin pigmentation. The oxygen numbers CPAP Clarity shows for an EMAY night are worked out from the recording, not taken from the EMAY app's own report. If you see low oxygen at rest, talk to your sleep physician, and never change your CPAP therapy on your own based on these numbers. ## What the EMAY SleepO2 Is The EMAY SleepO2 is an overnight oxygen monitor from EMAY. The main unit straps to your wrist, and a soft silicone sensor plugged into it goes over a fingertip. It records your blood oxygen saturation (SpO2) and your pulse while you sleep, and it stores the night in its own memory, so your phone does not need to be nearby. EMAY's own getting-started guide lists 48 hours of built-in memory, a rechargeable battery rated for 12 hours of continuous recording, and a weight of about 20 grams. The unit has no screen. EMAY describes that as a deliberate choice for sleep, since a lit display would disturb the night. Everything you see happens later in the EMAY Pulse Oximeter app on your iPhone or Android phone, which pulls the recording off the device over Bluetooth. Two details from EMAY's guide matter for anyone who wants clean data in CPAP Clarity. First, the device's clock starts at 2000-01-01 until you connect it to the app for the first time, which sets the real date and time. A recording made before that would carry the wrong date, so CPAP Clarity will not import one dated that way rather than file it under a night it does not belong to. Second, EMAY notes that taking your finger out of the sensor during the night can split the recording into several sessions. That is normal, and the section on importing below explains how CPAP Clarity handles it. ## Why Put Oximeter Data Next to Your CPAP Your CPAP counts the breathing events it detects and reports them as your AHI. An oximeter never sees your airway. It sees what your blood oxygen did across the same hours. Most of the time the two agree. When they disagree, for example a low AHI on a night when your oxygen kept dipping, that mismatch is worth bringing to your sleep physician. Our guide on [why AHI and ODI can tell different stories](https://cpapclarity.com/learn/ahi-and-odi-relationship) walks through the common reasons. ## What the EMAY App Exports The EMAY app can save a night two ways, and CPAP Clarity reads both. - **The CSV file.** A plain spreadsheet file with four columns, Date, Time, SpO2(%) and PR(bpm). There is one row for every second of the recording. Dates are written month first, US style, and times use a 12-hour clock with AM and PM. - **The .spo2 file.** A compact binary file holding the same readings, one per second. You cannot open it in a spreadsheet, but CPAP Clarity reads it directly. It does not matter which one you pick. Both files carry the same night. When we compared the two exports of the first EMAY night a reader sent us, they agreed on every one of 30,138 seconds, value for value. Some seconds have no reading at all. In the CSV those rows are left blank, and in the .spo2 file they carry a "no reading" marker. CPAP Clarity treats those seconds as gaps in the recording. It never counts a missing second as an oxygen level of zero, which would look like a dramatic drop that never happened. The .spo2 file uses the same "SpO2 Assistant" style layout that OSCAR, the free desktop CPAP program, reads through its CMS50 oximeter loader, and EMAY's own guide for its EMO-80 monitor describes that monitor's SpO2 file as compatible with OSCAR. We have not opened a SleepO2 file in OSCAR ourselves, so treat that as likely rather than confirmed. ## Step 1: Record a Night and Sync It to the EMAY App Wear the SleepO2 as EMAY's guide describes and sleep as usual. In the morning, take your finger out of the sensor first. Then turn the unit on, open the EMAY Pulse Oximeter app and tap Connect. The app downloads the night from the device. EMAY lists two things that stop a sync from working. The sync will not start while your finger is still in the sensor, and it should not be done while the device is charging. Also know that EMAY clears the device's memory once a night has been downloaded to the app, so the app becomes the only copy. Exporting the file in the next step gives you a second copy you control. ## Step 2: Export the Night From the EMAY App In the app, tap the night you want to open its detail screen. EMAY's getting-started guide for the SleepO2 says to select Data List to reach the second-by-second data, then tap Share in the upper right corner to send the CSV file, which it describes sending by email. Send the file somewhere you can reach from the device you will use for CPAP Clarity. Emailing it to yourself works. You do not need to open, rename or edit it. The app can also save the night as a .spo2 file; the first reader who sent us EMAY data exported both. EMAY's SleepO2 guide does not describe that menu, so look for it among the night's share or export options. App screens change between versions, so if your menus look different from this description, look for the night's data list and its share or export option. Either file is fine. ## Step 3: Drop the File Onto CPAP Clarity Open the [CPAP Clarity home page](https://cpapclarity.com/) on your computer or phone and drop the CSV or the .spo2 file into the import zone, the same place you drop your CPAP SD card. CPAP Clarity recognizes an EMAY file by itself, so you do not have to tell it what device it came from. Keep the .spo2 file's name as the app saved it, since that name is part of how it is recognized; the CSV works whatever its name. - **Several files from one night.** If the recording was split into more than one session, import each file. Recordings that belong to the same night are combined into that night. - **Both files of the same night.** Importing the CSV and the .spo2 file of the same night does no harm. The readings line up second for second and are stored once, not twice. - **Daytime recordings.** A recording that starts during the day is flagged as a likely nap rather than treated as an overnight session. - **New nights later.** Export again and drop the new file. Nights you already imported stay where they are. ## Step 4: Find Your EMAY Night Next to Your CPAP Data Each EMAY night is matched to your CPAP night on the same date, the same way CPAP Clarity handles its other oximeters. You will find it in these places. - **The dashboard.** Your oxygen readings sit next to that night's AHI, leak and usage. - **History.** You can turn on the oxygen overlay to see your drop rate as a trend next to your CPAP trends. - **The oximeter page.** The [oximeter page](https://cpapclarity.com/oximeter) shows the full night of SpO2 and pulse, with the time spent below the oxygen thresholds marked. - **The therapy report.** Your oxygen nights carry into the printable therapy report you can bring to an appointment. - **Copy for AI.** The plain-text export includes your oxygen nights alongside your CPAP nights. The device appears as an "EMAY oximeter", because neither file names the exact model and we would rather not guess one. ## How to Read the Numbers Neither EMAY export includes a motion column, a waveform, or a drop count calculated by the device. The file holds an oxygen reading and a pulse reading for each second, and nothing else. So every summary number you see for an EMAY night is worked out by CPAP Clarity from those readings, using the same method it applies to the other oximeters it reads. That method has **not** yet been checked against the summary report inside the EMAY app. Some nights may match closely and others may not, and we cannot tell you which yet. When the EMAY app's report and CPAP Clarity disagree, treat the EMAY app as the reference for its own device. ### Lowest and average SpO2 Your lowest reading is the deepest single dip of the night, and your average shows where your oxygen sat overall. One very low second can come from the sensor shifting, so check how long a dip lasted on the oximeter page before reading much into it. ### Drop rate (ODI 3% and ODI 4%) The oxygen desaturation index, or ODI, counts how many times per hour your oxygen dropped below your own stable level for the night and then came back. CPAP Clarity reports it two ways. ODI 3% counts drops of more than 3 percent below that stable level, and ODI 4% counts drops of more than 4 percent. The 4% version is usually the same or lower, because it only counts the deeper drops. ODI is a count, not a diagnosis. It is useful as a trend over many nights and as a number to bring to your physician, especially when it moves differently from your AHI. Our [guide to pulse oximeters for CPAP users](https://cpapclarity.com/learn/pulse-oximeter-for-cpap) explains what ODI does and does not tell you. One difference from some other oximeters matters here. Devices that record motion let CPAP Clarity set aside readings taken while your hand was moving. The EMAY exports have no motion column, so that step cannot happen for an EMAY night. A restless night may include a few drops caused by movement rather than by your breathing. ### Time below 88, 90 and 92 percent These show how many minutes of the night your oxygen spent under each level. The 88 percent line has a specific origin. Medicare's national coverage decision for home oxygen (NCD 240.2) lists an oxygen saturation at or below 88 percent taken during sleep among its criteria for covering oxygen at night. CPAP Clarity counts time strictly below 88 percent, so a reading of exactly 88 counts toward Medicare's criterion but not toward this figure. It shows the line because it is a recognized reference point, not to suggest you do or do not need oxygen. Only your physician can make that call. ### Pulse You will see your average pulse and a high-end figure for the faster stretches. A pulse that runs well above your usual for several nights is worth mentioning at your next appointment. ## When to Talk to Your Doctor An oximeter's job here is to give you better questions for your sleep physician, not answers. Bring your readings to your physician, rather than acting on them alone, if you notice patterns like these. - Your oxygen spends time below 88 percent on more than an occasional night. - Your drop rate stays well above your usual across a stretch of nights, especially when your CPAP's AHI looks low. - You still wake up tired or with headaches even though your CPAP numbers look fine. - Your lowest reading is repeatedly very low and the dips last more than a moment on the oximeter page. These are signals to discuss, not changes to make yourself. Never adjust your pressure, mask routine or medications based on oximeter readings. A consumer device does not replace a sleep study or medical-grade testing your physician may order. ## Get Started If you already have an EMAY night saved in the app, export the CSV or the .spo2 file, then drop it onto the [CPAP Clarity home page](https://cpapclarity.com/). If you are not sure whether your CPAP or another device is covered too, our [supported devices guide](https://cpapclarity.com/learn/is-my-cpap-machine-supported) lists every machine, oximeter and wearable CPAP Clarity reads and what each one gives you. ## Frequently Asked Questions ### Should I export the CSV or the .spo2 file? Either one. They hold the same readings, one per second. On the first EMAY night we compared, the two files agreed on every one of 30,138 seconds. Pick whichever your app makes easier to send. ### Do CPAP Clarity's numbers match the EMAY app's report? We do not know yet, and we will not claim they do. The EMAY files carry no drop count from the device, so CPAP Clarity works out the drop rate, time below 88 percent and the other figures from your readings. Those figures have not yet been checked against the report inside the EMAY app. If the two disagree, treat the EMAY app as the reference for its own device. ### Why does motion show as not available? The EMAY exports have no motion column. CPAP Clarity leaves the figure blank instead of showing a zero the device never measured. ### Is my oxygen data uploaded anywhere? No. The file is read in your browser and stored on your own device. Nothing about your oximeter data is sent to CPAP Clarity's servers, and there is no account. ### My night was split into several recordings. What do I do? Import each file. Recordings that belong to the same night are combined into that night, so you see one oxygen night next to one CPAP night. ## Primary Sources - EMAY. *SleepO2 Wrist Pulse Oximeter, Getting Started.* The source for the device's design (wrist unit with a silicone finger sensor, no screen), the 48 hours of built-in memory, the 12-hour battery rating, the weight of about 20 grams, the 2000-01-01 default clock, the sync steps, the automatic clearing of the device after download, the Data List and Share steps for the CSV, and EMAY's statement that the device is for reference only. [emaycare.com SleepO2 getting started](https://www.emaycare.com/blogs/get-started/sleepo2-wrist-pulse-oximeter) - EMAY. *EMO-80 Sleep Oxygen Monitor, Getting Started.* EMAY's statement that its SpO2 file is compatible with OSCAR. [emaycare.com EMO-80 getting started](https://www.emaycare.com/blogs/get-started/emo-80-sleep-oxygen-monitor) - Centers for Medicare & Medicaid Services. *National Coverage Determination 240.2, Home Use of Oxygen.* Lists an arterial oxygen saturation at or below 88 percent taken during sleep among the criteria for covering oxygen during sleep. [cms.gov NCD 240.2](https://www.cms.gov/medicare-coverage-database/view/ncd.aspx?ncdid=169) - The file layout, the blank no-reading seconds and the 30,138-second agreement between the two exports come from our own reading of the files a CPAP Clarity user contributed.