NightWell:Smart Sleep Tracker

5.3.42

C2 INC

4.19

26,862 reviews

1,000,000+
Downloads

Free

Sleep smarter with gentle alarms, sleep & snore tracking, and restful insights.

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About NightWell:Smart Sleep Tracker

NightWell:Smart Sleep Tracker is a health & fitness app developed by C2 INC.

Download Statistics

NightWell:Smart Sleep Tracker has been downloaded 2.5 million times. In the last 30 days, the app was downloaded 6 thousand times. It is ranked #6 in health & fitness.

User Ratings

NightWell:Smart Sleep Tracker is rated 4.19 out of 5 stars. The rating is based on 27 thousand ratings.

App Information

NightWell:Smart Sleep Tracker is FREE to download. The APK download size is 100.88 MB. The latest version available is 5.3.42. The last update was on June 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 July 2013.

Description

Discover deeper, more restful nights with NightWell, your smart sleep companion.

More data about NightWell:Smart Sleep Tracker

Price	Free to download
Total downloads	2.5 million
Recent downloads	6 thousand
Rating	4.19 based on 27 thousand ratings
Ranking	Top ranked
Version	5.3.42
APK size	100.9 MB
Number of libraries	73
Designed for Android	9.0+
Suitable for	Everyone
Ads	Contains ads

App Performance Report

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Alternative downloads for the NightWell:Smart Sleep Tracker app

NightWell:Smart Sleep Tracker compared with similar apps

Common keywords of similar apps

Subscription Service Free Fee Trial Hours Support Trouble Report Charged Google Terms Privacy Alarms Restful Nightwell Tips People Falling Waking Lull Sound Device Premium Id Cancel Period Expiration Date Updates Policy En Sleep Alarm Wake Improve Insights Smart Gently Designed Day Sounds Relax Refreshed Morning Features Asleep App Https

Keywords missing from this app

Tracker Noise White Clock Cycle Tracking Relaxing Fall Quality Deep Monitor Track Bedtime Snoring Recorder Habits Analysis Enjoy Time Snore Rest Stories Night Experience Light Gentle Understand Patterns Tools Nature Start Watch Relaxation

Google Play Rating history and histogram

16K

4.6K

1.7K

2.1K

1.7K

Downloads over time

NightWell:Smart Sleep Tracker has been downloaded 2.5 million times. Over the past 30 days, it averaged 200 downloads per day.

Changelog of NightWell:Smart Sleep Tracker

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Developer information for C2 INC

C2 INC

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

Top rankings

Rank	Country	Category	List
6	Japan	Health & Fitness	Top Grossing
70	Japan	Health & Fitness	Top Free

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Ranking history in Japan

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Technologies used by NightWell:Smart Sleep Tracker

NightWell:Smart Sleep Tracker is requesting 40 permissions and is using 73 libraries.

Permissions

Development tools

test access to protected storage

Your location

approximate (network-based) location, precise (GPS) location

Network communication

view network connections, view Wi-Fi connections, full network access, Google Play billing service, receive data from Internet

Your accounts

read Google service configuration

Storage

modify or delete the contents of your USB storage

Phone calls

read phone status and identity

Hardware controls

record audio, control vibration

System tools

disable your screen lock, run at startup, reorder running apps, draw over other apps, prevent phone from sleeping, modify system settings

Extra

android.permission.ACCESS_ADSERVICES_AD_ID, android.permission.ACCESS_ADSERVICES_ATTRIBUTION, android.permission.ACCESS_ADSERVICES_TOPICS, android.permission.ACCESS_NOTIFICATION_POLICY, android.permission.ACTIVITY_RECOGNITION, android.permission.FOREGROUND_SERVICE, android.permission.FOREGROUND_SERVICE_DATA_SYNC, android.permission.FOREGROUND_SERVICE_MEDIA_PLAYBACK, android.permission.FOREGROUND_SERVICE_MICROPHONE, android.permission.HIGH_SAMPLING_RATE_SENSORS, android.permission.POST_NOTIFICATIONS, android.permission.READ_BASIC_PHONE_STATE, android.permission.READ_MEDIA_AUDIO, android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS, android.permission.SCHEDULE_EXACT_ALARM, android.permission.USE_EXACT_ALARM, android.permission.USE_FULL_SCREEN_INTENT, com.applovin.array.apphub.permission.BIND_APPHUB_SERVICE, com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE, com.google.android.gms.permission.AD_ID, jp.co.c2inc.deepsleep.pokemedi.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

Ad network libraries

AdMob

Facebook Audience Network Open Measurement Android Library Icon

Open Measurement Unity Ads Android Library Icon

Unity Ads

AppLovin

Pangle

Adjust

AdColony

Vungle

Amazon Mobile Ads Tapjoy Android Library Icon

Tapjoy

PubMatic

Social libraries

Twitter Kit LINE SDK Android Library Icon

LINE SDK

Development tools

Android Jetpack core

Android Architecture Components

Android Jetpack VersionedParcelable Android Jetpack Annotations Android Library Icon

Android Jetpack Annotations Firebase Android Library Icon

Firebase

Android Jetpack Widgets Android Jetpack AppCompat Android Library Icon

Android Jetpack AppCompat AndroidX Activity Android Library Icon

AndroidX Activity Android Activity Saved State Android Library Icon

Android Activity Saved State AndroidX Loader Android Library Icon

AndroidX Loader Android Jetpack Media Android Library Icon

Android Jetpack Media Google Cloud Messaging (GCM) Android Library Icon

Google Cloud Messaging (GCM)

Android Transition Support Library Kotlin Android Library Icon

Kotlin

Android Support Library collections

Android Support VectorDrawable

AndroidX Legacy: Support Library core utils AndroidX Cursor Adapter Android Library Icon

AndroidX Cursor Adapter AndroidX App Startup Android Library Icon

AndroidX App Startup

AndroidX Local Broadcast Manager

Android Support Library Print Google gson Android Library Icon

Google gson

Android Support Library Document File

AndroidX Legacy: Support Library core UI Android WorkManager Android Library Icon

Android WorkManager AndroidX Widget ViewPager2 Android Library Icon

AndroidX Widget ViewPager2

Android Support Library Async Layout Inflater Okio Android Library Icon

Okio

AndroidX Emoji / Emoji2 AndroidX Concurrent Futures Android Library Icon

AndroidX Concurrent Futures JetBrains Annotations Android Library Icon

JetBrains Annotations IntelliJ IDEA Android Library Icon

IntelliJ IDEA AndroidX Tracing Android Library Icon

AndroidX Tracing AndroidX SQLite Android Library Icon

AndroidX SQLite AndroidX Multi-Dex Library Android Library Icon

AndroidX Multi-Dex Library Chromium Android Library Icon

Chromium

AndroidX DynamicAnimation Google Maps SDK Android Library Icon

Google Maps SDK Google Guava Android Library Icon

Google Guava AndroidX Inspection Android Library Icon

AndroidX Inspection AndroidX WebKit Android Library Icon

AndroidX WebKit Retrofit Android Library Icon

Retrofit

Picasso

AndroidX Resource Inspection AndroidX Preference Android Library Icon

AndroidX Preference Jetpack WindowManager Android Library Icon

Jetpack WindowManager Android View Binding Android Library Icon

Android View Binding The Checker Framework Android Library Icon

The Checker Framework Jetpack Navigation Android Library Icon

Jetpack Navigation Lottie Android Library Icon

Lottie

Volley

FasterXML Jackson Apache Commons Codec Android Library Icon

Apache Commons Codec MPAndroidChart Android Library Icon

MPAndroidChart Joda Android Library Icon

Joda

ByteDance APM Insight PhotoView Android Library Icon

PhotoView

Apache Commons Lang AChartEngine Android Library Icon

AChartEngine

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