Pulse oximetry

How to get your pulse oximeter data into a CPAP app

You can add blood oxygen and pulse readings from a pulse oximeter to your nights. CPAP Analysis imports from these devices.

Wellue / Viatom devices

These steps are ViHealth's, the app Wellue and Viatom ship with the O2Ring, O2Ring S, SleepU and Checkme O2.

Every night from now on

Sync with Apple Health

  1. Open the ViHealth app, go to the Profile tab and tap Third Party Services.
  2. Turn on Apple Health.
  3. If you haven't connected Apple Health here yet, open any night and tap its SpO2 card.
  4. Open ViHealth after each night so the ring can hand its recording over.

One recording at a time

Share a recording manually

  1. In ViHealth, open the History tab and tap the recording you want.
  2. Tap the share icon in the top right.
  3. On the Share Blood Oxygen records sheet, under Select format, choose CSV or Binary – not the preselected PDF.
  4. Tap Share, then choose CPAP Analysis.

ResMed machines

The Nonin WristOx₂ 3150 (BLE model) pairs directly with AirSense 11 and AirCurve 11 machines. Its readings arrive with your CPAP data automatically – nothing to set up in this app.

CPAP Analysis is not affiliated with any device manufacturer.

See Your CPAP Data on iPhone

Plug in your SD card, import in seconds, and explore rolling AHI, event timelines, and pressure charts — all on your phone.

Download Free on the App Store

Still stuck?

Tell us which oximeter you have and what you are seeing, and we will point you at the fix.

Email [email protected]

Bringing in your CPAP data too? See the SD card import guide.