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About this app

"Somnus" is a popular free alarm clock app in Japan that allows you to measure and improve your sleep quality with your smartphone.

It's a must-have app to improve your sleep quality, such as alarming when you sleep lightly and waking up refreshed in the morning, or knowing the sleep improvement that suits you!

[Recommended for people like this]
・ Those who want to manage sleep easily
・ People who tend to have a disordered lifestyle and want to correct it
・ Those who have difficulty getting up in the morning and cannot sleep during the night
・ Those who have trouble sleeping but do not know what to do
・ Those who want to improve their sleep quality
・ Those who want to improve their daytime performance

[Characteristics of Somnus]
● Easy sleep management / improvement with the app
You can measure your sleep quality with your smartphone. Just set it from the app before going to bed and you'll know your sleep quality.

● Alarm at the timing of light sleep
You can wake up refreshed in the morning by alarming at the best time you wake up.
You can choose from 40 alarm sounds, and you can also set your favorite music.

● Understand behaviors that improve sleep quality
You can find out when drowsiness occurs and recommended bedtime.
We will provide you with recommended actions such as when you are sleepy, when you wake up in the morning, and before you go to bed.

● Analyze your sleep habits in detail
Find out your sleep problems by analyzing not only your daily sleep time, but also the quality of your sleep that you don't usually know, such as how long it took you to fall asleep and how much deep sleep you have.

● Find the sleep improvement that suits you
Each person has different ways to improve their sleep problems. Somnas provides sleep improvement content that suits you and supports a good night's sleep.

● Sleep comfortably with the sleep introduction sound
You can listen to more than 50 sleep-inducing sounds that invite you to sleep for free. We have prepared sounds for various situations such as sleep introduction, relax / concentration mode, and nap.

● You can find good sleep goods that improve the quality of sleep
You can discover and purchase good sleep goods carefully selected by Somnas from the app. You can also shop at a great price by using the sleep points that you can earn when you sleep.
* Sleep points are only for registered users.

[How to use]
1. Launch the app and tap the "Home"-"Add Alarm" button to set your favorite alarm.
2. Tap the "Start measurement" button at the bottom of the screen to start sleep measurement.
3. Please go to bed with your smartphone on your bedside.
4. When the alarm sounds in the morning and the measurement is stopped, a record of the day is created.
5. You can check the record of the day from "Record" and "Analysis".

● Precautions when using sleep measurement
* Keep your device on your bedside, futon or mattress to detect body movements during sleep measurement.

* During sleep measurement, it is recommended to charge a lot and connect it to a charger as much as possible. (Our tests have shown that 6-7 hours of sleep overnight consumes an average of about 10% charge.)

【Operating environment】
Supported environment: Android 5.0 or higher
Recommended environment: Android 8.0 or above

Official site:
Terms of Service:
Privacy policy:
User's Guide:

[About inquiries]
If you have any other questions or concerns, please contact us from the app "My Page"-"Inquiries" or contact our support desk.

Our mission is to "enrich people's lives from sleep", and we strive to improve our products and services every day.
We will continue to do our best to support your sleep.
Updated on
Dec 26, 2022

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
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No data collected
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Data is encrypted in transit
You can request that data be deleted

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