JUKUSUI:Sleep log, Alarm clock 5.3.21

株式会社C2（C2, Inc.） – Freeware – Android
out of 26965 votes

JUKUSUI: The Ultimate Sleep Companion

Boris Weber

05/14/2025

JUKUSUI offers an integrated sleep logging and alarm clock experience that helps users improve their sleep quality with smart features, but could benefit from a more intuitive interface.

JUKUSUI is a Japanese app that aims to promote a restful and deep sleep experience for users worldwide. This multi-functional alarm clock provides a range of features to support and enhance sleep quality.

About JUKUSUI APP

Lull Sounds

Enjoy soothing lull sounds that are designed to induce peaceful sleep.
Smart Alarm

The app detects your light sleep phase and gently wakes you up, making it especially beneficial for individuals who wake up feeling tired or struggle to wake up in the morning due to low blood pressure. Say goodbye to snooze button battles!
Sleep Report

Access your daily sleep log, which includes information about the quality of your sleep, sleep efficiency, hours of sleep, as well as snoring duration and volume. Simply tap the "Bedtime" button to start tracking your sleep.
Cloud Service

All your valuable sleep data is securely stored on our dedicated server. When you sign up for the service through the app, your daily sleep logs are automatically updated and backed up. Even if you switch devices, your data can be easily transferred. It's a convenient and free service!

JUKUSUI Premium Subscription

By subscribing to JUKUSUI Premium, you gain access to all the premium features without any advertisements within the app.
The subscription fee will be charged to your Google ID.
A free trial is offered per Google ID.
To cancel your subscription during the trial period, please follow the cancellation procedure at least 24 hours before the trial ends.
The subscription fee will be charged within 24 hours before the expiration date. You can cancel the renewal more than 24 hours prior to the expiration date. Please note that the subscription fee is non-refundable, even if you cancel before the end of the subscription period.
If you wish to cancel your subscription, simply navigate to the MENU section on Google Play.

Terms of Service & Privacy Policy

For detailed information about our Terms of Service, please visit: https://jukusui.com/en/terms
To learn more about our Privacy Policy, please visit: https://jukusui.com/en/privacy

Support

If you have any questions or need assistance, please contact us at: [email protected]. We are here to help!

Overview

JUKUSUI:Sleep log, Alarm clock is a Freeware software in the category Home & Hobby developed by 株式会社C2（C2, Inc.）.

The latest version of JUKUSUI:Sleep log, Alarm clock is 5.3.21, released on 05/20/2025. It was initially added to our database on 10/13/2023.

JUKUSUI:Sleep log, Alarm clock runs on the following operating systems: Android.

Users of JUKUSUI:Sleep log, Alarm clock gave it a rating of 4 out of 5 stars.

FAQ

What is JUKUSUI?

JUKUSUI is a sleep log and alarm clock application designed by C2, Inc. that helps users track their sleep patterns and wake up at optimal times.

How does JUKUSUI track my sleep?

JUKUSUI utilizes advanced algorithms and user input about sleep times to log your sleep data, providing insights into your sleep quality and patterns.

Can I customize the alarm settings in JUKUSUI?

Yes, JUKUSUI allows users to customize alarm times, sounds, and snooze options to suit individual preferences.

Is JUKUSUI available for both iOS and Android?

Yes, JUKUSUI is available for download on both iOS and Android platforms.

Does JUKUSUI require an internet connection to work?

No, JUKUSUI can work offline as it primarily functions based on the data you input manually or through the device's sensors.

Can I sync my sleep data with other health apps?

JUKUSUI has the capability to sync with various health tracking applications, allowing for integration of health data.

What features come with the JUKUSUI app besides sleep logging?

In addition to sleep logging, JUKUSUI includes features like sleep quality analysis, an intelligent alarm that wakes you at the optimal time, and sleep tips based on your data.

Is there a cost associated with using JUKUSUI?

JUKUSUI is free to download but may offer in-app purchases or premium features for advanced functionalities.

How does the intelligent alarm work?

The intelligent alarm analyzes your sleep cycle and wakes you during a light sleep phase within a specified time frame to help you feel more refreshed.

Can I manually input my sleep data?

Yes, users can manually log their sleep times if they prefer not to use automatic tracking.

Boris Weber

I am an editor at UpdateStar. I started as a support engineer, and am now specialized in writing about general software topics from a usability and performance angle among others. I telecommute from UpdateStar’s Berlin office, when I am not working remote as a digital nomad for UpdateStar. When I'm not analyzing the latest software updates, you can find me exploring new cities, immersing myself in local cultures, and discovering innovative tech trends across the globe.

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