Sleep Time+ Cycle Alarm Clock vs REM Sleep Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sleep Time+ Cycle Alarm Clock
Understand your sleep patterns and wake up feeling refreshed. This app tracks sleep cycles, offers soothing soundscapes for falling asleep, and measures resting heart rate without wearables. It provides detailed analysis and customizable alarms to optimize your sleep and wake-up experience.
- Sleep cycle analysis
- Soothing soundscapes
- Resting heart rate measurement
- Smart alarm clock
- Detailed sleep graphs
- Apple Health integration
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Fall asleep, stay asleep, and wake up refreshed! Sleep Time is a complete sleep tracker and smart alarm clock. Place your phone on the bed and Sleep Time analyzes your sleep cycles through the night, then wakes you during your lightest sleep within your chosen window — so you start the day rested instead of groggy. Trusted by over 35 million users, Sleep Time is an award-winning sleep app. ------------------ 5/5 “I finally understand why I wake up tired some mornings. Sleep Time showed me my sleep cycles, and the smart alarm has made my mornings so much easier — I haven’t hit snooze in weeks.” 5/5 “I’ve tried several apps that log sleep duration and stages, and the interface of Sleep Time is the best by far. It’s easy to understand and simple to use.” 5/5 “Fascinating results. It works remarkably well providing helpful information.” Featured on: TechCrunch, Mashable, Lifehacker, 148apps, eHealth, and many others. ----------------- MAIN FEATURES √ Set the alarm clock with a single gesture √ Fall asleep to soothing soundscapes and white noise √ Alarm rings even in silent mode √ Choose from 20 built-in alarm sounds √ Wake up to your favorite song from your music library √ Sleep Lab™ with light, deep, and REM sleep analysis √ Detailed daily, weekly, and monthly graphs √ Smart wake-up window for a gentler start to the day √ Full history makes night-to-night comparison easy √ Cloud backup and restore for your sleep data √ Clear, easy-to-read interface √ Apple Health integration We build Sleep Time for our users and would love your feedback. Tell us what you think so we can keep improving the app. Upgrade to Premium for unlimited soundscapes, advanced sleep insights, priority support, and an ad-free experience with an auto-renewable subscription. We offer auto-renewable subscriptions with the following terms: - Payment will be charged to your iTunes account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase - No cancellation of the current subscription is allowed during active subscription period - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication - Our privacy policy and terms of use: https://www.azumio.com/page/privacypolicy Sweet Dreams, Azumio Team
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.
- 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
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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
Verdict
The clearest difference is review sentiment: Sleep Time+ Cycle Alarm Clock at 69% against REM Sleep Tracker's 0%. Sleep Time+ Cycle Alarm Clock also leads on rating (4.8 vs 4.2) and ratings volume (2.5K vs 49). REM Sleep Tracker's advantage is monetization model (freemium vs subscription) and ads (none vs shown). On price, in-app purchases, device support and iOS requirement 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
Both are free to download. Sleep Time+ Cycle Alarm Clock sells 8 in-app purchases, starting at $4.99 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.
Sleep Time+ Cycle Alarm Clock holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: Sleep Time+ Cycle Alarm Clock has 2.5K ratings behind it against 49, so its average is the more settled of the two. Written reviews point the same way: 69% of Sleep Time+ Cycle Alarm Clock's written reviews are positive against 0% of REM Sleep Tracker's.
Sleep Time+ Cycle Alarm Clock ships an update monthly, REM Sleep Tracker every 2 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | Sleep Time+ Cycle Alarm Clock | REM Sleep Tracker |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (2.5K ratings) — better | 4.2 (49 ratings) |
| Positive reviews | 68.8% of reviews — better | 0.0% of reviews |
| Number of ratings | 2.5K — better | 49 |
| Update frequency | Monthly | Every 2 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Subscription | Freemium — better |
| Devices | iPhone | iPhone |
| Requires iOS | 16.0 | 16.0 |
| Further details — not scored | ||
| Size | 185 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Azumio Inc. | Nicola Eusebi |
Customer experience
Sleep Time+ Cycle Alarm Clock
REM Sleep Tracker
Bugs and requests
Sleep Time+ Cycle Alarm Clock
Reported bugs
4 issues- Crashes on startup
- Freezing issues
- Inconsistent alarm behavior
- Lost sleep data after updates
Requested features
4 requests- Heart rate monitoring integration
- Sleep data export and analysis
- Apple Watch companion app
- More customization options
REM Sleep Tracker
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Sleep Time+ Cycle Alarm Clock
- Premium$4.991 Month
- Premium$8.991 Month
- Premium$9.991 Month
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- Premium7 Days trial2 variants$9.991 Month
- Premium$19.993 Months
- Premium$29.991 Year
- Premium1 Month trial2 variants$29.991 Year
- Premium$46.991 Year
REM Sleep Tracker
- Sleep Score Premium Yearly$9.991 Year
- Sleep Score Premium Yearly7 Days trial$29.991 Year
Questions
Is Sleep Time+ Cycle Alarm Clock free?
Is REM Sleep Tracker free?
Which has better reviews, Sleep Time+ Cycle Alarm Clock or REM Sleep Tracker?
Do Sleep Time+ Cycle Alarm Clock or REM Sleep Tracker have ads?
Which is updated more often, Sleep Time+ Cycle Alarm Clock or REM Sleep Tracker?
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