Testing sensor

1. What it does

Testing sensor gives you confirmation the wearable is connected properly, and the companion app is sending data about your movement.

2. Where to find it

Settings → Wearables → Test sensor

3. How it works

During the Test sensor, the app connects to the selected wearable, confirms the proper connection and then shows you the detected movement.

test wearable
Figure 1. Test sensor (wearable)

When the test sensor is successful, you will see a green graph reacting to your movement (with a short delay, as the data are sent in batches). The graph is labeled "Test sensor: Wearable" - the app is using data from wearable.
When the test sensor fails, it will fall back into phone’s accelerometer or sonar (depending on your choice of sensor). The graph is labeled "Test sensor: Accelerometer / Sonar" - the app is using data from phone’s sensor.

wearable test
Figure 2. Successful vs failed test of wearable connection

FAQ

Cannot install app on Wear OS device

If you come from Wear OS 1.0, please note that Wear OS 2.0 changed the way apps get installed on the watch, you now need to install them manually using Play Store on the watch.

Companion apps also have a special way to install on the watch:
If you already have Sleep as Android installed on your phone, then the watch app can be only installed from Apps on your phone and for some reason not directly from Play Store.

How to get there:

  1. Make sure the watch is connected to the phone.

  2. Go to app list on your watch, select Play Store.

  3. Scroll past Recommended for you, Top Free Apps etc., until you see Apps on your phone.

  4. Scroll down until you see Sleep.

  5. Click the download button to the right. Done!

  6. Now, you can enable the connection in Settings → Wearables → Use wearable → Wear OS.

  7. Test the connection in Settings → Wearables → Test sensor - you should see a graph reacting to your movement (a short delay is normal, data are sent in batches).

Customized vibrations on MiBands

Vibration can be controlled only from the companion app, because the integration with MiBands is not direct (the API is not available for the integration).
Luckily, both companion apps allow vibration customization in the pro versions.

1. Tools & MiBand

  1. Enable priority override mode for MiBand Tools app: pull down the notification bar, and on the MiBand Tools status bar notification, press the first icon multiple times, until you enter priority override mode = you will se an exclamation mark.

  2. In Mi Band Tools app: Leftmenu → Settings → Sleep as Android → Custom vibration adjust the vibrations. You can set vibration count and length, and delay between vibrations.

  3. Test the resulting vibration pattern with Test vibration.

2. Notify & Fitness

  1. Enable custom vibrations in Sleep as Android settings section.

  2. Open the vibration settings with the Vibration button.

  3. Adjust the vibration pattern - you can change intensity and duration, and also vibration delay.

  4. Test the resulting vibration pattern with the Play button in the top right corner.

Do you support / integrate my device?

For all currently supported devices, check out list of compatible devices.

If you’d like us to integrate another device, please add it as a suggestion to our suggestion forum. Also please check whether the device has an API so we can integrate it.

Duration is shorter, lenght is wrong

​The Sleep Duration is total sum of all your sleep phases (Light, REM, and Deep), not counting the awake phases - because when awake, you are actually not sleeping.
​So on default settings, the Sleep duration is always a bit shorter than the duration of tracking.

​If you wish your Sleep duration is the same as tracking duration:

  • Disable the awake detection in Settings → Sleep tracking → Awake detection.

  • You can also try to adjust the sensitivity of each type of settings to get optimal results. In most cases, too much awake periods are caused by significant HR peaks.

  • If you are not sure, where those awake periods come from, please use Leftmenu → Report a bug, and send us the application log.

How do I get BT smart heart rate device work with Sleep as Android?

  1. Enable the tracking in Settings → Wearables →Bluetooth Smart (might be hidden under Advanced section).

  2. Try to pair with your device (this may not be required for all devices and OS versions).

  3. Make sure no other app is using your device while sleep tracking.

If nothing helps please send us a debug report using Leftmenu → ic bug Report a bug.

Note BT Smart heart rate tracking only works from Android 4.3 onward

How does Sleep as Android (actigraphy) compare to Polysomnography?

We use a different input than polysomnographists, and define our own sleep phases, reflecting an objective aspect of sleep, easy to measure with common devices. One naturally needs to ask whether there is any relationship between the EEG-phases and our ACT-phases.

Fortunately, several research teams raised similar questions before (See this one, or this one, or this one, or this one). They measured a bunch of people on a traditional polysomnograph and recorded their physical activity at the same time (By filming them and then counting the movements manually, or by using accelerometer readings). The published analyses show that there indeed is a significant statistical relationship between EEG-phases and body movements.

You can also read about comparison of Sleep as Android algorithms and Sleep lab results on our blog here.

How does the Battery saving mode in Sleep tracking work?

Battery saving mode currently resumes full tracking before the smart wake up period in order to find the best moment for your wake up, so the tracking uses up just a fraction of the battery consumption for the whole night. If the battery would drop under your defined stand-by threshold (default: 10%) the battery saving mode will re-occur.

I do not trust the results, it is fake / generating random data

Accelerometric sensors are really sensitive, which is great for sleep tracking. Normally, what you see when you leave the phone on the table gets immediately dwarfed when you do some more significant move. Just leave phone on the table for a while and you will see a dramatic development, but then move the phone and you will see all the development is really tiny in comparison to the new peak.

So what you see is random noise, given by very small vibrations of the table or in very calm areas by seismic movement. We mark the data relatively, so you always get it distinguished into light and deep sleep. But the algorithm works well only in conditions that are assumed by it, i.e. in the bed with relatively large movement peaks.
To be more specific, if you leave the phone on a table, you can get values perhaps on the scale of 0.000001 to 0.000009 m/s2 (The value is made up here, but it is physically very small). In the bed, you may get values from 1 to 9 m/s2 (which is physically large). The algorithm sees though just that the high value is 9 times higher than the low value, in both cases.
We had to do this because every accelerometer (in different cell phones) measures differently, so we couldn’t assume any standard conversion formula that would respond to absolute values.

So if you use the phone in the bed, it is in fact drastically different from measuring on a calm spot, just like the table.

Please do not hesitate to ask for any clarification at support@urbandroid.org.

I have a dog / cat sleeping with me in bed. Will the sleep tracking be accurate?

This depends on several factors. The general rule is to not allow the pet to move your phone, ideally only your movements should move the device. So in this case it’s best to place Your device either under the pillow or to have an armband or smartwatch/smartband. If your pet is a calm one, it may just work. However, if your pet is used to jump in and out of bed several times a night, the sleep tracking will most probably register these events as light sleep occurrences.

Is sonar safe?

Is sleep tracking with sonar safe for your health?

Ultrasound is generally considered safe if it is at normal volume. Regarding health effects, it works in a similar way to normal audible sound, i.e. very loud ultrasound can damage your hearing, whereas at low volume it is safe to hear. When using speakers, smartphones are nowhere close to be able to produce such loud sounds as to damage your hearing.
We also use ultrasound that is very close to the hearing range (around 20 kHz), so the effects of the ultrasound are almost identical to hearing a high pitched sound at the same volume (expect you can’t hear it at all).
The ultrasound volume we use is around 40 dB – which is lower than normal speech volume. You can measure the sound level yourself using e.g. this app.

Is sonar safe for your pets (cats, dogs, bats)?

For pets that are able to hear it, the ultrasound emitted from Sleep as Android is a constant low noise. The situation is similar to e.g. refrigerator noise. It is there, you can hear it, but it’s not so much disturbing. The ultrasound definitely cannot damage your pets hearing at the volume used in Sleep as Android.
Bats can be confused and fly into walls.

Is sleep tracking with sonar safe for your smartphone?

The only difference between normal audible sound and our sonar is that the frequency is a little higher (normal frequencies 2 Hz-20 kHz, our sonar frequencies 18 kHz-22 kHz). This is so small difference for the mic and speaker membranes that there is definitely no chance of damage, even with prolonged usage.

Mi Band button dismiss / snooze

You can choose, if the MiBand button has the power to snooze or dismiss your alarms.
If you need some extra motivation to get out of bed, you can have the button without any action - are forced to get up and dismiss the alarm on the phone.

1. Tools & MiBand

In Leftmenu → Settings → Sleep as Android → Mi Band Button Action

  • None - the button will not have any effect on alarm

  • Dismiss

  • Snooze

2. Notify & Fitness

In Sleep as Android settings section:

  • Dismiss - enables dismissing alarm with the button (dismiss will be confirmed with a vibration)

  • Snooze - with two button press, you can snooze the alarm (will be confirmed with a vibration)

  • No action for the button - disable both previous options

No heart rate measurements from my watch

Please check our integration table table – only devices with a heart icon will measure heart rate with Sleep as Android. Other smartwatches with HR sensor need to go around SaA – save HR to S Health or Google Fit, from where Sleep as Android will download it. Please note that Sleep as Android downloads the measurements usually with a day’s delay (the sync is triggered once another record is saved).

For enabling heart rate monitoring with compatible wearables, go to Settings → Wearables > Heart rate monitoring.
For enabling heart rate monitoring with BT smart device, go to Settings → Wearables → Bluetooth Smart.

BT Smart device
  1. Try to pair with your device (this may not be required for all devices and OS versions).

  2. Make sure no other app is using your device while sleep tracking…​

MiBands

Check your HR settings in the Mi Fit app.
When the Mi Band is in Sleep Assistant HR mode in Mi Fit, it doesn’t feed the HR data to Mi Band Tools / Sleep as Android. When it is in regular HR tracking mode (24-hour), it works.

  • Tools&MiBand - Check if Heart Rate Monitor is enabled in T&MB Leftmenu → Heart Rateic cogHeart Rate monitor

  • Notify&Fitness - Enable heart rate monitoring in N&F ic action graphSleep → Monitor heart, and also in N&F ic action graphSleep → More options → Sleep as Android → Settings → Heart monitor

Wear OS
  • For older versions of Android (4 and lower) on your phone, you need to opt-in to our Beta testing channel. Newer version no longer needs to be in Beta.

Phone gets hot during tracking

Usually this is not caused by the sleep tracking directly as this is usually not consuming too much resources (usually around 1-3% battery per hour of tracking).
The issue appears because we hold a wake lock (keeping the phone awake) – any badly written apps may access the CPU extensively during the sleep tracking time. We suggest checking which services are running before you get to sleep.
For us it is hard to debug this. Also battery statistics are not a hint here as all battery consumption is accounted to the app which holds the lock even it did not consume the battery – this is by design in Android.

To conclude, this issue may happen, although we did not get any similar reports for a very long time now. But the most probable cause is some wrong 3rd party service or app on your device.

To see more on the issue we would need a debug report (menu > report a bug).

A good test would be to reboot your phone before sleep tracking (or kill any unnecessary services running) and see if that helps.

Quick guide to start with Sleep as Android

At first Sleep as Android may look complex with all its options, but in fact it is fairly easy to get started improving your sleep and wake up.
You can delve deep into all the amazing options Sleep as Android provides later on. But to get started just rely on our carefully selected defaults.

  1. Use the top right plus icon to set up your Alarm time (e.g. 8:00). Tap the desired time directly on the clock - hours first, minutes second.

    quick alarm 1
  2. Confirm the selected time with SET button, it will show you the new alarm settings. Confirm the alarm with DONE.

    quick alarm 2
  3. Smart wake up makes sure to find the best time for your wake up between 7:30 – 8:00 based on your sleep cycle.

  4. You can now see the alarm scheduled on the main screen.

  5. Tap the moon and Sleep tracking starts, we use your phone’s sensor to find out what sleep phase you are in (see How it works).

    quick alarm 3
    Note We recommend turning on airplane mode during sleep tracking
  6. Now just place the phone on the mattress near your body (see Setup sleep tracking) so it is able to sense your movement and wake you in the right sleep phase to bring your wake up experience to a new level

  7. After dismissing the alarm in the morning you will see your sleep phases, deep sleep % and more..

Samsung Galaxy Gear - Watch app stuck on "Start tracking"

This can be a result of multiple things, so please make sure to do the following troubleshooting:

  1. Make sure you have Sleep as Android Gear Addon installed on your phone

  2. It can happen that the addon cannot be started by us if it was force stopped previously. In that case please go to Play Store app on your phone, open addon page tap on “OPEN”.

  3. Opt out of any battery savers that you might have on your phone, for all involved apps (Sleep as Android, Sleep as Android Gear Addon, Samsung Accessory Services) – to find out how to do that, please consult dontkillmyapp.com

  4. Samsung Accessory services sometimes misbehaves and prevents connection to the watch for 3rd party apps. Please uninstall and reinstall it.

Sonar is audible, strange sounds when using sonar

We have reports that on some device you can hear audible artifacts during sonar tracking. It sounds like this:

Some of the signal gets into audible spectrum probably due to either insufficient quality of the speaker or some post processing which is applied to the output on your device firmware.

We have also some reports that Sonar can get audible suddenly during tracking in the night. Unfortunately we are not sure why this could happen, we only have very few such reports and we are not able to reproduce this on our phones.

To make any audible artifacts less likely:

  1. Go to Settings > Sleep tracking > Test sensor.

  2. Try different frequency from the drop down menu list.

  3. When you find the least affected frequency, you could try lowering the volume a bit (the sliding bar). But keep it as high as possible to maintain reliable results.

Note If the volume needs to be adjusted, always confirm that sonar is still working - ideally after you change settings, try to sit calm in font of the test for few seconds and than move slightly - do you see a spike?

Tracking crashes, stops suddenly

If the tracking stops completely after few minutes, the background processes are restricted by your system.

  • Make sure no system restrictions are applied to Sleep as Android, or any companion app for a tracking with wearable: Check our guide here.

  • If the guide won’t help, send us your log using Leftmenu → ic bug Report a bug.

Tracking starts on its own

  1. Please make sure that you are not accidentally starting the Sleep as Android app from your watch. This would start sleep tracking immediately.

  2. Make sure you are not using automatic start of sleep tracking in Settings → Sleep tracking → Start sleep tracking.
    You can find more information about automatic sleep tracking start here.

Volume goes down when tracking

If your volume gradually lowers after a while, when the tracking is running, the option Turn off when sleeping is enabled. This feature lowers the system-wide volume, so it affects even music played outside Sleep.

  1. Go to Settings → Lullabies → Turn off when sleeping.

  2. Extend the minimal playback time (5-90 min).

  3. Or disable the feature completely by setting it to Use current device volume.

Volume jumps to max when tracking

Warning The volume needs to be kept at maximum when tracking with sonar for maintaining the reliable results.
  • Unfortunately, this also affects media volume in 3rd party apps, and we cannot control those separately from sonar media volume. This means that while using sonar, you can only use media apps on full volume.

  • You can set a time delay on start of tracking in Settings → Sleep tracking → Awake detection → Delayed sleep tracking.

External players
  • When using sonar, you cannot control media volume by volume buttons as it always jumps back to maximum.

Lullabies
  • You can control volume of lullabies from the Sleep app (Settings → Lullabies), and from the Lullaby add-on pack.

  • When you lower the volume with volume buttons, the lullaby volume is estimated and adjusted accordingly, sonar volume is still kept at maximum.

Why is Sleep eating so much battery? What about battery overheating?

Usually battery consumption issue or related issues causing phone over-heating during sleep tracking are not caused by the sleep tracking directly.

In most cases sleep tracking itself is not consuming too much battery (usually around 1-2% per hour of tracking). But because we hold a wake lock (keeping the phone awake) any other usually badly written apps may access the CPU extensively during the sleep tracking time. We would suggest checking which services are running before you get to sleep. For us it is hard to debug this. Also battery statistics are not a hint here as all battery consumption is accounted to the app which holds the wake lock even it did not consume the battery (this is by design in Android).
A good test would be to reboot your phone before sleep tracking (or kill any unnecessary services running) and see if sleep tracking will still consume too much battery afterward. Features within Sleep as Android which may cause higher CPU load during tracking include noise recording. You may try tracking without it for a reference. Also I would strongly recommend to track with airplane mode on.

Why is there a red bar / section / block in my sleep graph?

The red block indicates that something went wrong with tracking at that time and the device stopped providing sensor data for some reason. Usually those are some non-standard battery optimizations or battery savers, the battery gets too low so we preserve it for the alarm or connectivity issue if you use a wearable.

1. Battery restrictions

Make sure no system restrictions are applied to Sleep, or any involved apps like wearable companion app).
See our guide here, and follow the instructions.

2. Too low battery

When the battery is too low (usually below 10%), data collecting is terminated to preserve enough battery for alarm.
When the battery was too low, there is a battery icon is displayed on the graph:

low battery
Figure 1. Low battery graph

3. Connectivity issues with a wearable

When the connection with the wearable is lost, you can see red sections on the graph. The app always tries to reach the wearable again.
The graph can look like this:

red wearable
Figure 2. Connection lost during tracking
  1. Opt-out from any battery restrictions is applied by your system (https://dontkillmyapp.com/)

  2. Pair the wearable with your phone in System settings.

  3. Make sure the BT is not lost, and try lowering the distance between the phone and the wearable.

  4. Try settings the device as Trusted device.

Why it is not possible to enable airplane mode automatically after sleep tracking starts?

Unfortunately due to dummy security restrictions the Android team introduced in 4.2 there is no option to enable airplane mode from an app automatically. You always have to use the settings or long touch power button. If you have a rooted phone you may consider using https://play.google.com/store/apps/details?id=lv.id.dm.airplanemh we have support for that in Sleep. There is a similar hack for 4.3.

If you don’t agree with the Android team design decision you can upvote issue 40497 here http://code.google.com/p/android/issues/detail?id=40497.

Why sleep record data count towards the end date

There is no clearcut answer to which day the sleep between them belongs.

We have decided to attach the sleep to the day after, because how you slept will largely determine how your day will be.

Will sleep tracking work with two people in the bed?

If you have separate mattresses there is minimum interference from your partner. If you have one big shared mattress (which isn’t recommended as you partner may need different mattress for his healthy sleep), it could still work assuming you keep your phone close to your body and ideally on your side of the bed.

You can also consider using a armbands or smartwatches. This certainly solves the problem for a little convenience trade-off.

If both of you are tracking, you can enable pair tracking, which filters out the partner’s activity.