Best Free CPAP Data Tools Compared (2026)

Five Tools, Different Audiences

If you want to see more than what your CPAP machine's screen shows, you have options. But they serve different audiences, run on different platforms, and show different levels of detail. Picking the right one depends on what you actually need.

This is an honest comparison. CPAP Clarity is one of these tools, so full transparency: we built it and we think it fills a gap the others do not. But every tool on this list does something well, and the right choice depends on your situation.

The Comparison

	CPAP Clarity	OSCAR	AirwayLab	myAir	SleepHQ
Price	Free	Free	Free core, $79-199/yr	Free (with ResMed)	$15/mo
Platform	Browser (any device)	Desktop (Windows, Mac, Linux)	Browser	Mobile app	Cloud + mobile
Privacy	Client-side only	Local only	Client-side only	Cloud (ResMed servers)	Cloud
Install required	No	Yes (Qt application)	No	Yes (mobile app)	Yes (mobile app)
Devices	ResMed AS10/11, AirCurve 10, BMC E-20A	All major brands	ResMed AS10, AirCurve 10, partial AS11	ResMed only	ResMed, F&P
Data source	SD card (drag and drop)	SD card	SD card	Bluetooth/cellular (automatic)	Cloud sync
AHI breakdown	Yes (OA, CA, Hyp, mixed)	Yes (full event detail)	Yes	Basic (total only)	Basic
Pressure charts	Yes	Yes (raw waveform)	Yes	No	Limited
Leak charts	Yes	Yes	Yes	Seal indicator only	Limited
Flow limitation	Yes (chart + insights)	Yes (raw waveform)	Yes (4 research engines)	No	No
Therapy score	Yes (0-100, 4 components)	No	Yes (Glasgow Index, WAT, NED)	Yes (0-100, simplified)	No
PDF reports	Yes (shareable)	Yes (printing)	Yes (clinical format)	No	No
Insight rules	48 plain-English rules	Manual interpretation	Clinical scoring	Generic tips	None
Content/articles	70+ articles, glossary	Wiki/forum	13 articles	None	None
Screening tools	7 standalone tools	None	None	None	None

CPAP Clarity

Best for: CPAP users who want clear analysis without installing software. First-time data explorers. People who want plain-English insights rather than raw waveforms.

CPAP Clarity is a browser-based tool that reads your SD card and shows AHI breakdowns, pressure and leak charts, a therapy score, and 48 insight rules that explain your data in plain language. It runs entirely in your browser. Nothing is uploaded. No account needed.

Strengths:

• Zero setup. Open the site, drag in your SD card folder, see your data.
• Plain-English insights that explain what your numbers mean and when to talk to your doctor.
• 7 standalone screening tools (Epworth, STOP-BANG, Berlin, ISI, Compliance Calculator, Mask Finder, Sleep Cycle Calculator) that work without any data import.
• PDF reports formatted for your doctor.
• 70+ educational articles on CPAP therapy, sleep apnea, and sleep health.
• Works on phone, tablet, or computer. No install.

Limitations:

• No raw breath-by-breath waveform data (OSCAR's core strength).
• Supports ResMed and BMC only (OSCAR supports all brands).
• No pulse oximetry integration.
• No provider/clinic workflow.

Price: Free. No premium tier. Revenue comes from ads on article pages and affiliate links.

OSCAR

Best for: power users who want maximum data depth. Users with non-ResMed machines. People comfortable with desktop software.

OSCAR (Open Source CPAP Analysis Reporter) is a free, open-source desktop application that has been the gold standard for CPAP data analysis for years. It supports every major CPAP brand and shows data down to individual breaths.

Strengths:

• Supports all major brands: ResMed, Philips, Fisher & Paykel, DeVilbiss, Resvent, Lowenstein.
• Raw waveform data (breath-by-breath flow rates from BRP.edf files). No other consumer tool shows this level of detail.
• Highly configurable charts and date ranges.
• Active community on ApneaBoard forums with decades of collective knowledge.
• Completely free and open source (GPL-3.0).

Limitations:

• Requires installation (Windows, Mac, or Linux). No mobile or web version.
• Steep learning curve. The interface assumes familiarity with sleep data terminology.
• No plain-English interpretation. You need to know what you are looking at.
• No therapy score or automated insights.
• No companion content or educational articles.
• Community-maintained, so updates can be inconsistent.

Price: Free (open source).

AirwayLab

Best for: flow limitation power users and UARS patients. People who feel terrible despite a normal AHI. Clinicians managing complex cases.

AirwayLab is a browser-based analysis tool focused on flow limitation depth. It targets users with upper airway resistance syndrome (UARS) and treatment-emergent central apnea, conditions where standard AHI numbers miss the problem.

Strengths:

• Four independent flow limitation scoring engines (Glasgow Inspiratory Flow Index, WAT, NED, and a custom index). No other consumer tool offers this depth.
• Pulse oximetry integration.
• Provider workflow (share data with your clinic).
• Client-side privacy model (same as CPAP Clarity).

Limitations:

• Supports ResMed only (AS10, AirCurve 10, partial AS11).
• Free tier is limited. Full features require $79-199/year subscription.
• 13 articles (vs 70+ on CPAP Clarity).
• No standalone screening tools.
• Narrower audience: optimized for clinical use cases, not general CPAP users.

Price: Free core, $79/yr standard, $199/yr clinical.

myAir

Best for: people who want zero effort. Users who do not want to remove their SD card.

myAir is ResMed's companion app. It connects to your AirSense 10 or 11 via Bluetooth and cellular, automatically syncing your data every day. You see a score from 0 to 100, usage hours, mask seal rating, and events per hour.

Strengths:

• Automatic. No SD card removal, no file transfer, no setup.
• Daily score gives a quick check-in without interpreting charts.
• Sleep coaching tips.
• Available on iOS and Android.

Limitations:

• Dramatically simplified data. No AHI breakdown by event type. No pressure charts. No leak charts. No flow limitation.
• The 0-100 score is opaque. ResMed does not publish the full formula.
• ResMed only (no other brands).
• Data stored on ResMed's cloud servers (not client-side).
• No PDF export. No AI export. No way to share detailed data with your doctor beyond what myAir shows.

Price: Free with any compatible ResMed machine.

The gap myAir leaves: if your myAir score drops and you want to know why, myAir cannot tell you. Was it a leak spike? Pressure change? Cluster of central events? You need your SD card and a tool like CPAP Clarity or OSCAR to answer those questions.

SleepHQ

Best for: users who want cloud-based data access across devices.

SleepHQ is a cloud-based platform that syncs CPAP data and provides analysis accessible from any device. It supports ResMed and Fisher & Paykel machines.

Strengths:

• Cloud sync means your data is accessible from any device.
• Supports both ResMed and Fisher & Paykel.
• Trend tracking over time.

Limitations:

• $15/month subscription (the most expensive option).
• Data stored in the cloud (privacy trade-off).
• Less analytical depth than OSCAR, CPAP Clarity, or AirwayLab.
• Smaller community and less educational content.

Price: $15/month.

Which Should You Use?

If you just got a CPAP and want to understand your data: start with CPAP Clarity. Zero setup, plain-English insights, and free. If you outgrow it, OSCAR is always there for deeper analysis.

If you have a non-ResMed machine: OSCAR is your only option with broad device support.

If you have UARS or flow limitation concerns: AirwayLab's four scoring engines provide clinical depth that no other tool matches.

If you do not want to touch your SD card: myAir works automatically but shows you very little.

If you want cloud access from any device: SleepHQ, but consider the privacy and cost trade-offs.

There is no rule against using more than one. Many power users run OSCAR for waveform analysis and CPAP Clarity for the therapy score, insights, and PDF reports. The tools read the same SD card data and do not interfere with each other.

What You Need to Get Started

All SD-card-based tools (CPAP Clarity, OSCAR, AirwayLab) need you to remove the SD card from your machine and connect it to your computer. You will need an SD card reader (opens in new tab) if your computer does not have a built-in slot. For the best data quality, use a reliable SD card (opens in new tab) and replace it if your machine reports read/write errors.

Try CPAP Clarity

Import your SD card data at cpapclarity.com to see what your machine is recording. No account, no uploads, no cost. Takes about 60 seconds. If you want to learn more about reading your data first, start with How to Read CPAP Data.

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