Comparison

Sleep Tracker vs REM Sleep Tracker

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Sleep Tracker

This comprehensive sleep app helps you understand your sleep patterns. It records snoring, offers a smart alarm to wake you during light sleep, and provides soothing sounds to help you fall asleep. You can also track factors affecting your sleep and integrate with Apple Health.

Highlights
  • Snore recording with smart detection
  • Smart alarm for gentle wake-ups
  • Sleepy sounds for relaxation
  • Snoring cessation features
  • Sleep cycle analysis and charts
  • Apple Health integration
Features
Read full description

The Sleep Center is a superior all-in-one sleep application. It consists of four modules: RECORDER, SMART ALARM, STOP SNORING, SLEEPY SOUNDS. RECORDER Records your talk or snoring while you are asleep (automatic or manual sensitivity level, records only snoring using smart snoring detection), creates the graph of noise in room during the night, takes the total time of snoring down. SMART ALARM Helps you to wake up easy in your lightest sleep phase and allows you to get up relaxed every morning. Improve your sleep naturally, maximize your sleep efficiency. STOP SNORING Tries to stop your snoring by playing chosen sound or using iPhone vibration when the snoring is detected. SLEEPY SOUNDS Plays sounds which are specially selected to make you relax and makes your falling asleep easier. Surely you will appreciate a function - automatic fade out time - if the application detects you are asleep, it will automatically stop playing sounds. HIGHLIGHTS: - ADJUSTABLE RECORDING SOUND SENSITIVITY: For different sound conditions in your room (a quiet or loud environment). - HIGH TECH SNORING DETECTION: Accurate snoring detection based on A.I. - POSSIBILITY OF RECORDING ONLY SNORING - AUDIO VISUALIZATION DURING RECORDING OR PLAYING - FAVORITE RECORDINGS - SHARING RECORDINGS WITH YOUR FRIENDS: Send recordings via email, iMessage or post to Facebook. - UNLIMITED ALARMS: Set your own alarms, daily alarms, weekly alarms, etc. You can use included alarm sounds or your own iPod music. - SMART WAKE UP: Wake up with gradual alarm when you are in your lightest sleep phase (based on your movements). - SLEEP TRACKER: Sleep cycle analyzes and statistics with complete history and beautiful charts. - SNOOZE BY SHAKING: No need to unlock screen or enter password. - STOP SNORING: Possibility of playing chosen sound or using iPhone vibration when the snoring is detected. - SLEEPY SOUNDS: More than 40 sounds with the possibility to mix these sounds together. - FACTORS, WAKE UP MOOD, NOTES: User can place factors (alcohol, coffee, stress etc.) to every night as well as the mood after waking up or add own notes. - ACTIVATION DELAY: Starts monitoring after a period of time. - BACKGROUND MODE: Monitoring runs also in background mode. Alarm also fires from background. - APPLE HEALTH INTEGRATION Optionally save your sleep analysis into your Apple Health database. - iCLOUD SYNCHRONIZATION: Synchronization among your devices and between free and paid version. - EXPORTING HISTORY TO CSV FILE - APPLE WATCH: Tracks your sleep movements and plays haptic (sound, vibration) if alarm is triggered or snoring is detected. CUSTOMER SUPPORT Happy customers are our highest priority. If you have a problem with our app, please contact us at sleepcenter@apirox.com. SUBSCRIPTION INFORMATION Your payment will be charged to your iTunes Account as soon as you confirm your purchase. You can manage your subscriptions and turn off auto-renewal from your Account Settings after the purchase. Your subscription will renew automatically, unless you turn off auto-renew at least 24 hours before the end of the current period. The cost of renewal will be charged to your account in the 24 hours prior to the end of the current period. When canceling a subscription, your subscription will stay active until the end of the period. Auto-renewal will be disabled, but the current subscription will not be refunded. Any unused portion of a free trial period, if offered, will be forfeited when purchasing a subscription. Terms and Conditions: https://apirox.com/docs/sleep_center_lite/terms_and_conditions.php Terms of Use: https://apirox.com/docs/sleep_center_lite/terms_of_use.php Privacy Policy: https://apirox.com/docs/sleep_center_lite/privacy_policy.php

About

REM Sleep Tracker

This app analyzes Apple Watch sensor data to provide a sleep quality score. It offers detailed insights into sleep stages, heart rate, and weekly trends, helping users understand and improve their rest habits.

Highlights
  • Sleep quality scoring
  • Detailed sleep stage analysis (light, deep, REM)
  • Heart rate monitoring
  • Weekly trend tracking
  • Sleep bank concept for habit analysis
  • Apple Health integration
Features
Read full description

Sleep Monitor is the perfect app for people eager to enhance the quality of their nighttime rest. Thanks to an advanced algorithm, Sleep Monitor processes the data gathered by your Apple Watch sensors to provide you with an overall score representing the quality of your sleep. This innovative app offers a detailed analysis of the different sleep stages, monitoring light, deep, and REM sleep cycles, and providing information about your heart rate throughout the night. Additionally, Sleep Monitor allows you to track your progress with the "sleep bank" concept, a repository of your rest data that helps you better understand your habits and identify any issues. With Sleep Monitor, you can also monitor the weekly trends of various parameters, such as sleep duration, rest quality, and time spent in each sleep stage. This valuable information will enable you to make targeted lifestyle changes to improve your nighttime rest. Don't miss the opportunity to transform your Apple Watch into a powerful tool for better sleep and waking up more rejuvenated each day. Sleep Monitor is the ideal app for those seeking an ally in sleep management, with an intuitive design and a rich array of features. Download Sleep Monitor today and begin your journey towards more restful and regenerative sleep. Maximize the potential of your Apple Watch and discover how quality rest can improve your daily life! HealthKit Integrated with Apple Health for sleep stages, heart rate, respiratory frequency, age and gender data to calculate sleep quality. Sleep Monitor Premium Sleep Monitor offers a Premium version available as an auto-renewable subscription. Payment will be charged to iTunes Account at confirmation of purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period at the rate of your selected plan above. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings on the device. Once purchased, refunds will not be provided for any unused portion of the term. Privacy policy: http://app.sleepscoreapp.com/Home/Privacy Terms of use: http://app.sleepscoreapp.com/Home/Terms

Screenshots

Sleep Tracker4 screens
REM Sleep Tracker4 screens

Verdict

The call

Sleep Tracker and REM Sleep Tracker both sit at 4.3 stars, but that hides the real split: 40% of Sleep Tracker's written reviews are positive against 0% of REM Sleep Tracker's. Sleep Tracker also leads on device support (4 vs 1). REM Sleep Tracker's advantage is update cadence (every 2 weeks vs every 2 months). On price, rating, ratings volume and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Sleep Tracker sells 4 in-app purchases, starting at $6.99 per month and REM Sleep Tracker sells 2 in-app purchases, starting at $9.99 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.3 for Sleep Tracker against 4.2 for REM Sleep Tracker. Both are backed by a comparable volume of ratings — 128 and 49 respectively. Written reviews are what separate them: 40% of Sleep Tracker's written reviews are positive against 0% of REM Sleep Tracker's.

UpkeepUpdate frequency

Sleep Tracker ships an update every 2 months, REM Sleep Tracker every 2 weeks. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Sleep Tracker versus REM Sleep Tracker: the parameters behind the verdict, then further details
ParameterSleep TrackerREM Sleep Tracker
PriceFreeFree
Rating4.3 (128 ratings) — better4.2 (49 ratings)
Positive reviews40.4% of reviews — better0.0% of reviews
Number of ratings128 — better49
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone
Requires iOS15.0 — better16.0
Further details — not scored
Size79 MB25 MB
Age rating4+4+
DeveloperApirox, s.r.o.Nicola Eusebi

Customer experience

Sleep Tracker

All ratings127 ratings
Positive80.3%
Neutral10.2%
Negative9.4%
Written reviews57 reviews
Positive40.4%
Neutral26.3%
Negative33.3%

REM Sleep Tracker

All ratings49 ratings
Positive79.6%
Neutral6.1%
Negative14.3%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

In-app purchases

4 purchases

Sleep Tracker

Subscriptions2
  • Full Version - Monthly$6.991 Month
  • Full Version - Yearly$23.991 Year
One-time2
  • Themes$0.99
  • Full Version$47.99
2 purchases

REM Sleep Tracker

Subscriptions2
  • Sleep Score Premium Yearly$9.991 Year
  • Sleep Score Premium Yearly7 Days trial$29.991 Year

Questions

Is Sleep Tracker free?
Sleep Tracker is free to download, with in-app purchases available.
Is REM Sleep Tracker free?
REM Sleep Tracker is free to download, with in-app purchases available.
Which has better reviews, Sleep Tracker or REM Sleep Tracker?
Sleep Tracker is rated higher. Sleep Tracker averages 4.3 out of 5 from 128 ratings, while REM Sleep Tracker averages 4.2 from 49 ratings.
Do Sleep Tracker or REM Sleep Tracker have ads?
Neither Sleep Tracker nor REM Sleep Tracker shows ads.
Which is updated more often, Sleep Tracker or REM Sleep Tracker?
Sleep Tracker ships an update every 2 months, and REM Sleep Tracker every 2 weeks. Most recently, Sleep Tracker was updated on October 29, 2026 and REM Sleep Tracker on October 24, 2026.

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