Quick Notes




Sign In

Pair Recorder

Start Recording

During Recording

Stop Recording


Download SleepImage App

If the SleepImage app does not appear in the Apple App Store or Google Play store on your device, make sure to search for “SleepImage”, or click the store badges at the top of this page.

If you still can’t find the app, the most likely reason is an incompatible Android or iOS version. In this case, please try a different mobile device (phone or tablet), if one is available in the household.

Sign In

If you cannot sign in to the app, first make sure the mobile device is connected to the internet and that there are no typos in the Patient Id.

It is also possible that your Date of Birth was entered incorrectly in the SleepImage System. Please contact your healthcare service provider to verify your sign-in information.


If you are using a Nonin WristOx2 Model 3150, please see “Pairing a Nonin Recorder” below.

If you paired a SleepImage Recorder in Bluetooth settings on the phone settings, unpair it first. Then, try the pairing process in the SleepImage App again.

Make sure Bluetooth is enabled, and that you have granted the necessary permissions to the SleepImage App. On iOS, go to Settings->SleepImage and enable the Bluetooth permission. On Android, go to Settings->Apps->Permissions->Location and select “Allow while using the app”. Android phones will also need to have Location turned on under Settings->Location.

Make sure your phone/tablets’ operating system is up-to-date.

After pressing the button with the magnifying glass icon, with the recorder powered on, wait at least 60 seconds. Some phones take longer to discover and pair with bluetooth accessories.

Restart both the phone/tablet and the recorder.

If there is another phone/tablet available, try that one to rule out that there is an issue with the recorder.

During Recording: Going Out of Range

If “Connection Lost” or “No SpO2 signal, check sensor” persists on the screen after going out of range and/or after the ring has been removed,

  1. Take off the ring,
  2. If a countdown starts, wait until it finishes,
  3. Put the ring back on the finger and wait at least 20 seconds.
  4. SpO2 and pulse rate values should appear if successful.


Please note that upload time is dependent on your network connection. Please leave the app in the foreground while the entries on the History tab say

If you have attempted an overnight recording per the instructions but your healthcare service provider (HSP) does not see a report, follow the instruction below:

  1. Force-close the SleepImage App (see instructions for iOS and Android)
  2. Make sure the phone is connected to the internet. 
  3. Open the SleepImage App. 
  4. Wait and look out for notifications at the bottom of the screen indicating an upload attempt. 
  5. Go to the History tab and wait until all entries in the list show “Upload Status: Completed” 
  6. If you see error messages, try switching from Wifi to Cellular or vice-versa. 

The above steps will ensure that any recordings that were performed are uploaded, in the event that the app was closed before completing the upload process, or if there was an issue during recording which caused the app to crash. 

Switching from WiFi to cellular, or vice-versa, may also solve the issue.

Airplane Mode

Avoid the use of Airplane Mode if possible, as it can block Bluetooth and Internet connections and interfere with your recording.

Unexpected Behavior

If recording is not active when you wake up in the morning, it’s possible that a problem occurred that halted the recording prematurely. Contact your healthcare provider, before you return your recorder, in case they want you to repeat the sleep study.

If you have experienced a failed recording, consider using a different mobile device if available. Please review the “Upload” section above for instructions on how to ensure all recordings are uploaded.

Firmware Upgrade Issues

When starting a recording, the app will notify you if new firmware is available for your SleepImage Ring. Firmware upgrades are mandatory to ensure that you get the latest features and best functionality.

During the firmware upgrade, please make sure to stay within range and keep the SleepImage App in the foreground on your mobile device.

Do not use your phone for other tasks while the upgrade is in progress.

If you encounter issues where the upgrade is failing, do NOT unpair your recorder.

If the upgrade fails, simply go back to the Recording page and click the start button. The app will notify you that the Ring is in range and the upgrade needs to be completed.

Once the upgrade is completed, your recording will start automatically.

Pairing a Nonin Recorder

When pairing the Nonin WristOx2 Model 3150 with the SleepImage App, follow these instructions:

  1. Go to your Phone’s Bluetooth settings.
  2. On the back of the Nonin, slide the battery door open and remove one of the batteries for 3 seconds.
  3. Replace the battery and close the battery door.
  4. Your Nonin recorder should show up in the list of nearby Bluetooth devices.
  5. Click the Nonin

Your Nonin is now paired with your phone. Continue in the SleepImage App.

  1. Go to the Settings screen in the SleepImage App and click “Connect New Recorder”.
  2. Place a finger into the Nonin sensor to power on the recorder.
  3. Your recorder should appear in the scan as “Nonin3150_123456789”.
  4. When your Nonin appears in the list, the Connect button.

If “ERROR 4” is displayed on the CheckMe O2 screen, the sensor may be damaged.

  1. Press and hold the power button on the CheckMe O2 for 10 seconds.
  2. Wait 10 seconds.
  3. With the sensor plugged in to the CheckMe O2, turn on the CheckMe O2.

If the screen still shows “ERROR 4” contact your healthcare service provider for a replacement.


Why does the SleepImage App ask for location permission on Android

The app needs this permission because a Bluetooth scan can be used to gather information about the location of the user. This information may come from the user’s own devices, as well as Bluetooth beacons in use at locations such as shops and transit facilities.

The SleepImage App does not record, track, or share the user’s location. Android requires that we ask for this permission to notify you, because the Bluetooth technology can be used for location services.

What information does the SleepImage App collect?

When you sign in to the SleepImage App, you enter your SleepImage Patient Id and Date of Birth. Patient Id is stored in the app while the DOB is only used to verify that you entered the Patient Id correctly. The Patient Id is a randomly generated identifier. As a result, all physiological data in the SleepImage App is de-identified for security reasons.

The SleepImage App does not store any personal identifying information.

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