NightWell:Smart Sleep Tracker is popular, with 2.5 million installs. Users rate it well: 4.2 stars from 27,058 ratings. Its best ranking is #10 in Top Grossing, Health & Fitness in Japan.
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.
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 7.4 thousand times. It is ranked #10 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 100.92 MB. The latest version available is 5.3.45. The last update was on September 16, 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.
Description by C2 INC(from Google Play)
Discover deeper, more restful nights with NightWell, your smart sleep companion. 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
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Comments on NightWell:Smart Sleep Tracker for Android
★★★★★Gina Palmer· May 24, 2018
I ran multiple sleep logging apps to work out which ones were the best.
This one, Sleep Cycle, and Sleep Time were the ones whose recordings matched
each other. Of these three, Smart Sleep has been the one that has worked
the most consistently.
★★★★★robin fitch· Aug 2, 2022
It doesn't make up my phone it tracks how much time I've been sleeping tablet it's really useful I got more sleep than yesterday until I found this app and my sister doesn't believe it but this is really helpful.
★★★★★Vincent Maldia· Aug 31, 2020
Best alarm app. It wakes you up when your sleep cycle is favorable. You can make weekly schedules. Just set it once and forget it. Annoying ads though.
★★★★☆Ariadne Stellori· Jul 23, 2017
It's alright (though I only use it for sleep tracking, not as an alarm), but I need 9 hours of sleep, and in the report it matches some data points against an "ideal" 7-hours sleep, giving me score 2/5 on Health with 9 hours of sleep and 5/5 on 6.5 hours. I would be a zombie sleeping only 7 hours regularly. It should only measure against the 7 hours from below, sleeping more doesn't make one less healthy.
★★☆☆☆Susanna Withers· Jan 12, 2018
🚩 Inappropriate attempt to skew ratings! I would have given this app more stars, but the very first time I used it, this message popped up: "Will give you Lull Sound Summer Night [lull sounds are a feature of the program and many are locked] if app review with ⭐5!" (can't attach my screenshot, but I have one.) It's too bad, because apart from a couple minor issues like the lull sound timer only going up to six hours, this was one of the best sleep data apps I could find, but blatantly offering gifts in return for five-star ratings (and after only one use!) is really not cool and probably grounds for getting kicked out of the marketplace. I did *not* officially flag the app with Google because I wanted to give the developers a chance to remove this message, but if it is still popping up for future users after, say, 1/31/18, I encourage someone to officially flag these folks. (Scroll down to the way bottom and flag is one of the last links on the app page.) There's a lot of good and useful stuff here but bargaining for ratings like that is unacceptable and doesn't give you an accurate picture of what the app needs anyway. Please remove that pop-up, devs. It's not only against the rules, but it really hurts your image.
★★☆☆☆tom d· Jul 6, 2018
Too bad they took away backup & restore options. I need to restore data
from my old phone which has an older version with offline backup option!
Now it won't let you restore data unless your data are on their "dedicated
cloud server."
Google Play Rankings for NightWell:Smart Sleep Tracker
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