Frequently asked questions

Typical steps


Charge the battery.Wear the sensor on thumb, index finger as option in case of too tight for thumb.Device will turn on automatically. After a few seconds, the device will begin to monitor.


The device turns off automatically in a moment after you take off the sensor.Open app to sync data which will help you get sleep insight.

(If the working time is less than 2 minute, the data will not be saved)

How to sync data?

After the countdown, run App to sync data;

OR next time after you turn on the device, run App to sync

How can I wake Screen up?

During measurement, the screen will go off automatically for saving power; you can turn your wrist to wake up the screen.

Do I need to pair Bluetooth?

The device Bluetooth will be enabled automatically after it’s turned on.

To establish a Bluetooth connection,

  1. keep the device Bluetooth enabled.
  2. Make sure the phone Bluetooth is enabled.
  3. Run the App.

Why do I need to allow Location access for Android?

With android phone, you need to allow Location access to make Bluetooth work. We DO NOTcollect your location data.

Do I need to power off the monitor manually?

If you don’t use it, it will power off automatically in a while.

If the battery runs out during use, will the data be saved?


Can I change the settings of vibration?

Yes. When you connect the monitor to your phone, you can turn on/off the vibration, change intensity or threshold.

Can I change finger during use?

Yes, when you take the sensor off, the countdown will begin. During the countdown, wear the sensor again, the record will be resumed.

How to correct the time on the screen if it’s incorrect?

Connect to your phone, time will be corrected automatically.

How can I connect new device with smart phone?

For the initial use, you need to add a new device.

1)Turn on device, run App, select ;

2)Then input thelast 4 digits on the back of your device.

Do I need to connect device to phone app duirng sleep?

It is not necessary. The built-in storage is up to 4 sessions.

Is SleepU a FDA regulated device?

Yes. SleepU is a U.S. Food and Drug Administration (FDA) listed Class II medical device that is under the enforcement discretion of the FDA. Our product is manufactured under a comprehensive quality system in an ISO 13485 facility.

Can the SleepU decide if I have Sleep Apnea?

SleepU accurately measures blood oxygen content, low oxygen level is usually a sign of respiratory arrest. These apnea events may indicate that a person is at risk of sleep apnea. But it is recommended that you consult your doctor for a formal diagnosis.