NightWell:Smart Sleep Tracker
NightWell:Smart Sleep Tracker is made and published by C2 INC. AppBrain is an independent app data site and isn't affiliated with C2 INC. The app name, icon, screenshots and description belong to C2 INC and are shown as published on Google Play.
AppBrain's verdict
EstablishedPopularWell ratedTop 10- Rating on Google Play
- 4.17
- 27,124 ratings
- Installs
- 2.5 million
- Last updated
- October 25, 2026
- Ads
- Contains ads
- Size
- 100.9 MB
NightWell:Smart Sleep Tracker is popular, with 2.5 million installs. Users rate it well: 4.2 stars from 27,124 ratings. Its best ranking is #6 in Top Grossing, Health & Fitness in Japan.
User feedback
Ratings and reviews on Google PlayComments on NightWell:Smart Sleep Tracker for Android
Google Play Rating history and histogram
Store listing
By C2 INC, from Google Play“Sleep smarter with gentle alarms, sleep & snore tracking, and restful insights.”
Description by C2 INC Written by the developer, not by AppBrain. Click to read.
Track sleep patterns, monitor snoring, and wake up gently with intelligent alarms designed around your natural rhythm.
Gain personalized insights to improve your rest, energy, and focus every day.
Calm sounds and mindful tips help you relax before bed and rise refreshed in the morning.
====Features====
NightWell is a multi-functional alarm clock designed to support and improve your sleep. For people who have trouble falling asleep or waking up refreshed, it has a lot of amazing functions to improve their sleep habits.
◆Lull Sounds
The healing lull sound will be played to induce peaceful sleep. This is very good for people who suffer from insomnia, who have trouble falling asleep or who need to relax more in sleeping.
◆Smart Alarm
This is available for those who always wake up feeling tired, who turn off the alarm only to fall back to sleep or who have trouble waking up in the morning due to hypotension. This monitors body movements using accelerometer in your smartphone and activates the alarm when you're in light sleep.
◆Sleep Report
If you use this app every day, you can get your own report analyzing your sleep in various aspects. This report detects your sleep cycle and provide you with the tips to sleep better.
◆Cloud Service
This is the service to keep all of your Sleep Log on the dedicated server safely.
When you change your device, you can transfer the data from your old device to the new one. This is a free service.
◆Others
・Wake-up task provides strong support for your awakening.
・Fade-In in the alarm sound wakes you up gently.
===="Premium" Subscriptions ====
●By purchasing the subscription, all Premium features are available for free and all in-app ads are hidden.
●The subscription fee will be charged to your Google ID.
●Offer the free trial per Google ID.
●The subscription fee will be charged within 24 hours before the end of the free trial. To cancel it during the free trial period, please proceed with the procedure more than 24 hours before the trial ends.
●The subscription fee will be charged within 24 hours before the expiration date. You can cancel the updates more than 24 hours before the expiration date.
●The subscription fee is non-refundable even if there is a time period of use when canceling your subscription.
●For cancellation of the updates, you can do it on MENU on Google Play.
====Terms of Service & Privacy Policy====
Terms of Service : https://jukusui.com/en/terms
Privacy Policy : https://jukusui.com/en/privacy
====Support====
jukusui@c2inc.co.jp
Recent changes:
We have launched a 7-day Ad-Free Plan.
Safety and technology
Found in the app by AppBrain- Ads
- Contains ads
- Price
- Free
- Libraries
- 73
- App size
- 100.9 MB
- Needs Android
- 9.0+
- Content rating
- Everyone
Technologies used by NightWell:Smart Sleep Tracker
Releases
Updates seen on Google Play- Version
- 5.4.0
- Launched
- July 2013
- Oct 25, 2026UpdateVersion 5.4.0
- Sep 16, 2026UpdateVersion 5.3.45
- Aug 16, 2026UpdateVersion 5.3.44
- Jul 8, 2026UpdateVersion 5.3.43
- Jun 16, 2026UpdateVersion 5.3.42
Alternatives
Similar apps and more from C2 INCAlternatives to NightWell:Smart Sleep Tracker
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Installs
Tracked by AppBrain- Last 30 days
- 7.7 thousand
- Per day
- 260
- 30-day average
- Play install range
- 1+ million
- Launched
- July 2013
Installs over time
NightWell:Smart Sleep Tracker has been installed 2.5 million times. Over the past 30 days, it averaged 260 installs per day.
Rankings
Google Play top charts- Highest rank
- #6
- Chart
- Top Grossing
- Health & Fitness
- Country
- Japan
Google Play Rankings for NightWell:Smart Sleep Tracker
Top rankings
Ranking history in Japan
About the app and developer
About NightWell:Smart Sleep Tracker
NightWell:Smart Sleep Tracker is a health & fitness app developed by C2 INC.
Install Statistics
NightWell:Smart Sleep Tracker has been installed 2.5 million times. In the last 30 days, the app was installed 7.7 thousand times. It is ranked #6 in health & fitness.
User Ratings
NightWell:Smart Sleep Tracker is rated 4.17 out of 5 stars. The rating is based on 27 thousand ratings.
App Information
NightWell:Smart Sleep Tracker is freely available from Google Play. The app size is 100.94 MB. The latest version available is 5.4.0. The last update was on October 25, 2026.
Technical Requirements
NightWell:Smart Sleep Tracker requires Android 9.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play since July 2013.
App Performance Report
Get a detailed PDF report for NightWell:Smart Sleep Tracker with download trends, rating history, and key performance statistics — useful for competitive research or tracking your own app. Learn more
Get PDF Report — $29Developer information for C2 INC
Frequently asked questions about NightWell:Smart Sleep Tracker
Is NightWell:Smart Sleep Tracker free?
Yes. NightWell:Smart Sleep Tracker is free on Google Play.
Is NightWell:Smart Sleep Tracker still available?
Yes. NightWell:Smart Sleep Tracker is on Google Play, and the last update we saw was on October 25, 2026.
Does NightWell:Smart Sleep Tracker contain ads?
Yes. Google Play lists NightWell:Smart Sleep Tracker as containing ads.
What Android version does NightWell:Smart Sleep Tracker require?
NightWell:Smart Sleep Tracker runs on Android 9.0 and higher.
How large is NightWell:Smart Sleep Tracker?
NightWell:Smart Sleep Tracker is 100.94 MB.
Is NightWell:Smart Sleep Tracker suitable for children?
Google Play rates the content of NightWell:Smart Sleep Tracker as suitable for everyone.
How many times has NightWell:Smart Sleep Tracker been installed?
Google Play lists 1,000,000+ installs for NightWell:Smart Sleep Tracker.
How do people rate NightWell:Smart Sleep Tracker?
NightWell:Smart Sleep Tracker scores 4.17 out of 5 stars, from 27,124 ratings on Google Play.
Who made NightWell:Smart Sleep Tracker?
NightWell:Smart Sleep Tracker was developed by C2 INC. It is listed in the health & fitness category on Google Play.
What are the best alternatives to NightWell:Smart Sleep Tracker?
People looking at NightWell:Smart Sleep Tracker also look at these health & fitness apps: Avrora: Sleep Tracker & Sounds, Sleepzy - Sleep Tracker Sounds, Sleep Tracker and Sleep Cycle, Alarm Clock & AI Sleep Tracker, Sleep Tracker & Sounds: Restly.
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