NightWell:Smart Sleep Tracker
NightWell:Smart Sleep Tracker Summary
NightWell:Smart Sleep Tracker is a ad-supported, with in-app purchases Android app in the Health And Fitness category, developed by C2 INC. First released 12 years ago(Jun 2013), the app has accumulated 2.4M+ total installs and 27.8K ratings with a 4.24★ (good) average rating.
Data tracking: SDKs and third-party integrations were last analyzed on Jan 5, 2026. The app's network data flows (API traffic to/from the app and its SDKs) were last crawled on Jan 3, 2026.
Store info: Last updated on Google Play on Jan 11, 2026 (version 353).
NightWell:Smart Sleep Tracker was last scanned for SDKs 2026-01-05. Below is the overview of third party companies detected in the app. The full list of raw SDKs, app permissions and unknown SDKs is available here.
Pangle
Prebid
ByteDance
Moloco
Firebase
Adjust
Amazon Advertisement
Kotlin
Unity
Square
Line4.24★
Ratings: 27.8K
Screenshots
App Description
Sleep smarter with gentle alarms, sleep & snore tracking, and restful insights.
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