From SD Card to Insights in 60 Seconds

Your CPAP machine collects incredibly detailed data every single night: pressure levels, leak rates, respiratory events, breathing patterns. The problem is getting to it. Your machine's screen shows a single AHI number. The myAir app gives you a simplified score. Neither one shows you the full picture. (If you've been using OSCAR, CPAP Clarity gives you a similar depth of data with a simpler interface.)

CPAP Clarity does. It reads your raw SD card data and turns it into clear, actionable insights, all in your browser, all for free, with your health data never leaving your device.

Here's how to get started.

Step 1: Find Your SD Card

Your ResMed machine stores therapy data on a standard SD card. You'll need to remove it briefly to import your data.

ResMed AirSense 11 (opens in new tab): Look on the left side of the machine for a small hinged door. Open it and gently push the SD card inward. It'll click and spring out slightly. Pull it the rest of the way with your fingers.

AirSense 10: The SD card slot is on the back panel, near the bottom. Same push-to-eject mechanism.

Don't worry about removing the card. Your machine continues recording to its internal memory while the SD card is out. Just remember to put it back when you're done so the next night's data gets saved to the card. For more detail on what your AirSense records, see ResMed AirSense 11 Data Explained.

You'll need an SD card reader to connect the card to your computer. Most laptops have a built-in slot, or you can use a USB adapter. If your machine's SD card is getting old or full, a fresh 32GB SD card (opens in new tab) is a good investment.

Step 2: Import Your Data

Open cpapclarity.com in your browser. You'll see the import area front and center.

Option A: Drag and drop. Open your SD card in your file browser and find the DATALOG folder. Drag the entire folder onto the import area on the page.

Option B: Browse. Click the "Browse" button and navigate to your SD card's DATALOG folder. Select it and confirm.

CPAP Clarity will read your files and process the data. This usually takes just a few seconds, even for months of recorded sessions.

About your privacy: All processing happens entirely in your browser using JavaScript. Your CPAP data is never uploaded to any server. There's no account to create, no cloud sync, no data collection. Your health information stays on your device. Period.

Step 3: Read Your Dashboard

Once your data loads, you'll see your most recent night's session on the dashboard. Here's what you're looking at:

The AHI Ring. This is your headline number, displayed prominently at the top. It shows your Apnea-Hypopnea Index, the number of breathing disruptions per hour. The ring is color-coded: green means excellent (under 5), and warmer colors indicate higher levels that deserve attention.

Stat Cards. Below the AHI ring, you'll see cards for your key therapy metrics:

Metric	What It Tells You
Leak Rate	How well your mask sealed (lower is better)
Pressure	The air pressure your machine delivered
Respiratory Rate	Your breathing rate in breaths per minute
Tidal Volume	How much air you moved with each breath

Each card shows your value with a color-coded status indicator: green for healthy ranges, amber or orange when something may need attention. You don't need to memorize normal ranges; the color coding does the interpretation for you.

Step 4: Understand Your Insights

Scroll down to the insights section. This is where CPAP Clarity translates your numbers into plain English.

Instead of wondering what a leak rate of 28 L/min means, you'll see something like: "Mask seal could be tighter", telling you your leak rate is elevated and suggesting you check your mask fit. Visit our leak fix guide for practical solutions.

If your events are primarily central apneas rather than obstructive, you'll see: "Mostly central events", explaining that these are brain-signaling pauses, not airway collapse, and that the treatment approach may differ.

Each insight is prioritized by importance. The things that matter most appear first.

Step 5: Browse Your History

Click History in the navigation bar to see your therapy over time. This is where patterns emerge that single-night views can't reveal.

The centerpiece is your Therapy Score, a number from 0 to 100 that combines four dimensions of your therapy:

Component	Weight	What It Measures
AHI Control	40%	How well your therapy controls breathing events
Usage Hours	30%	Whether you're wearing your mask long enough
Mask Seal	20%	How consistently your mask maintains a good seal
Nightly Consistency	10%	How steady your therapy is from night to night

Track your score over weeks to see the trajectory. A rising score means your therapy is improving. A dipping score helps you catch problems early, before they become habits.

Step 6: Download Your Report

CPAP Clarity generates PDF reports you can save, print, or share with your doctor.

Single-night report: From the dashboard, click "Download Report". You'll get a detailed PDF covering that night's AHI breakdown by event type, key metrics, time-series charts, and a plain-English narrative summary.

Multi-night summary: From the history page, click "Download Summary". This gives you an overview across multiple nights: therapy scores, per-night metrics, averages, and your weekly narrative.

These reports are designed for doctor appointments. They present your data in a clinical format that sleep physicians can quickly scan and act on. Learn more about what to bring to your sleep doctor visit.

Try It Now, No SD Card Needed

Not ready to import your own data? No problem. On the homepage, click "Try with sample data" to load a realistic demo session. You'll see exactly how the dashboard, insights, and reports work, so when you're ready to plug in your SD card, you'll know exactly what to expect.

The sample data walks you through everything: AHI breakdown, stat cards, insights, history view, and downloadable reports. It's the full experience with zero setup.

Your Data, Your Control

CPAP Clarity exists because your therapy data belongs to you, and understanding it shouldn't require a medical degree or complex desktop software. Whether you're preparing for a doctor's appointment, tracking your progress, or just curious about what happens while you sleep, your data is waiting on that little SD card.

Pull it out. Drop it in. See what your CPAP has been recording.

Start analyzing your CPAP data →

How to Use CPAP Clarity: A Complete Guide