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Understanding Your CPAP Data

Learn to read your CPAP numbers, interpret pressure graphs, and understand what your SD card data means for your therapy.

Your CPAP machine records detailed therapy data every night, including AHI events, leak rates, pressure curves, and breathing-pattern signals. Almost none of that data shows up in the consumer apps that ship with the machine. Articles in this category teach you what each metric means, where the data lives, and how to read it well enough to have a useful conversation with your sleep clinic.

Start with what AHI actually measures if you are new to CPAP data, or with the SD card import walkthrough if you have your card in hand and want to see your numbers tonight. Users who have already imported and want to understand what they are looking at usually jump straight to how to read your CPAP data.

Most of these guides reference your own data. CPAP Clarity reads your SD card client-side (your therapy data never leaves your browser), so you can follow along with the article on one tab and your dashboard on another.

Showing 24 of 24 articles

Understanding Your CPAP Data

24 articles
·8 min read

How to Track CPAP Compliance From Your Imported Data

Use the CPAP Clarity compliance tracker to monitor the Medicare 70%/4-hour rule, find your best 30-day window, and project your pass date.

·12 min read

Still Tired on CPAP? A Stepwise Guide to Find Out Why

Compliant on CPAP but still exhausted? Work through the diagnostic ladder: usage, residual AHI, RERAs, leak, sleep hygiene, and conditions beyond OSA.

·9 min read

Pulse Oximeters for CPAP: Why Track SpO2

An overnight pulse oximeter shows whether your CPAP is reaching your oxygen. How to read SpO2, ODI, and time below 88% on top of your AHI.

·7 min read

Best Free CPAP Data Tools Compared (2026)

Honest comparison of CPAP Clarity, OSCAR, myAir, and SleepHQ. Which CPAP data tool fits your needs?

·11 min read

Why Your AHI Went Up This Week and What to Check First

Practical triage for a sudden AHI rise. Check leak, pressure, mask age, event type, and lifestyle. When to escalate to your sleep doctor.

·9 min read

How to Back Up and Restore Your CPAP History

Download a zip of your CPAP Clarity history, save it locally, and restore it on any browser or computer. No cloud, no account.

·9 min read

CPAP Data Import from Google Drive, iCloud & OneDrive

Cloud-synced folders can't always be imported directly. Fix Google Drive, iCloud, OneDrive, and Dropbox placeholder errors in 60 seconds.

·8 min read

How Much Does CPAP Therapy Cost? 5-Year Guide (2026)

What CPAP therapy actually costs over 5 years: machine, masks, filters, supplies, power. Medicare vs cash, plus a free calculator to estimate yours.

·7 min read

CPAP SD Card Not Working? Fixes for Common Problems

Fix SD card errors on your ResMed AirSense 10, AirSense 11, or AirCurve 10. Card not recognized, corrupt data, formatting issues, and more.

·10 min read

Medicare CPAP Compliance: The 4-Hour Rule

Understand the Medicare CPAP compliance rule: 4+ hours on 70% of nights in a 30-day window. Learn how to track progress and what happens if you miss.

·12 min read

Treatment-Emergent Central Apnea: Causes and Solutions

CPAP can trigger central apneas in 5-15% of users. Learn what TECSA is, how to spot it in your data, and when to talk to your doctor.

·9 min read

Beyond myAir: See What Your ResMed CPAP Actually Records

myAir shows about 5% of your CPAP data. Your SD card has detailed charts, event breakdowns, and pressure trends myAir hides. Here's how to see them.

·8 min read

CPAP Data Privacy: How CPAP Clarity Protects You

Your CPAP records sensitive health data nightly. Learn how different tools handle that data, and why CPAP Clarity's browser-only approach keeps you in control.

·7 min read

How to Import Your CPAP Data on iPhone, iPad, or Android

Read your ResMed SD card on iPhone, iPad, or Android with a USB-C card reader. Step-by-step guide with product picks and troubleshooting.

·6 min read

What to Bring to Your Sleep Doctor Appointment

Make the most of your sleep doctor visit. Learn which CPAP metrics to share, how to get your data, and what questions to ask.

·5 min read

Getting the Most from Your ResMed AirSense 11 Data

Everything your AirSense 11 records on its SD card and how to access the detailed therapy data that myAir doesn't show you.

·8 min read

Central vs Obstructive Sleep Apnea: What's the Difference?

Your CPAP data shows different event types. Learn the difference between central and obstructive apneas and how it affects your treatment.

·9 min read

Understanding Your CPAP Pressure Settings

What do your CPAP pressure numbers mean? Learn about fixed vs auto pressure, how your machine adjusts, and how to read your pressure data.

·7 min read

Understanding EPR: Expiratory Pressure Relief on Your CPAP

EPR makes breathing out easier on your CPAP. Learn what the EPR settings mean, how they affect your therapy, and whether you should change yours.

·12 min read

How to Use CPAP Clarity: A Complete Guide

Import your CPAP SD card in 60 seconds. See your AHI trend, leak data, and a doctor-ready PDF. Free, no account, no upload. Your data stays on your device.

·8 min read

Understanding Flow Limitation on Your CPAP

What flow limitation means on your CPAP data, how to read the chart, and why it matters even when your AHI looks normal.

·11 min read

Your CPAP SD Card: What Data It Stores and How to Use It

Your CPAP SD card holds detailed sleep data that myAir never shows you. Learn what is on the card, how to access it, and what tools can read it.

·11 min read

How to Read Your CPAP Machine Data

A beginner-friendly guide to understanding the data your CPAP machine records: AHI, leak rate, pressure, events, and what they all mean.

·11 min read

Understanding Your AHI Score: A Complete Guide

Learn what AHI (Apnea-Hypopnea Index) means, what's a good score, and how to use your CPAP data to improve your sleep therapy.