Quick verdict
- What it is
- Store information collected; independent summary not yet available.
- At a glance
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- Free download · core features require a paid plan
- In-app purchases
- Subscription
Categories and search queries
Official categories
- Health & Fitness
- Lifestyle
AppCorpus categories
Key functions
| Function | Availability | Access | Scope | Evidence |
|---|---|---|---|---|
| Free app | Yes | Free | — | Store published |
| In-app purchases | Yes | Limited free | — | Store published |
| Subscription | Yes | Paid | — | Store published |
Screens
App Store
15 store screenshots
Pricing & paywalls
App Store
- Rem Premium — $29.99
Ratings & reviews
App Store
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5/5The app is not working and it not tracking my blood oxygen and snoring
I been tapping on sleep buttons to track my snoring instead the app is not tracking me snoring because it’s crashing and it’s also not tracking my blood oxygen levels and when I tap on track snoring when it’s saying good night it disappears when I get up because it’s not maintaining my record my blood oxygen and snoring tracking and when I get up the good night should still be on display with the orange microphone icon and I believe that there’s a bug issues that are causing the issues and I also aloud all across in the health data and turn all on and then I tap allow and it’s still not tracking my blood oxygen levels. Please update this app because it’s not tracking my blood oxygen levels and it’s not tracking my snoring and it’s also giving me a error message that says sync errors and saying sync issues can you please fix the issue with the sync issue so I can get accurate measurements
Nicohead · 6 Aug 2026
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1/5App not working 1.5 weeks for premium member, no support
I’ve been a premium member for 10 months. Overall, I had been happy with the app. While it never worked on my Apple Watch (which was annoying), it worked on my phone generally quite well. Occasionally, it had its glitches. But it was accurate overall and I depended on it daily for my sleep stats. I have multiple medical conditions that make monitoring my sleep habits important. A week and a half ago, the app suddenly stopped working. The screen where my sleep stats used to appear just shows green, yellow and red dancing lights but the stats never appear. I emailed support using the address from the FAQ screen in the app multiple times. I attempted contacting support through the Apple app but that screen just took me to an FAQ screen. I then reported the problem through the Apple app. When I got no response, I repeated this step as well. I got zero response no matter what method of contact I tried. It’s very disappointing to pay for this app, have it non-functional for 1.5 weeks, and then to have ZERO RESPONSE from development. If there is a problem with the app, someone from the company should be addressing this with the consumer who is supporting the product. This disrespect for the people who support the product is unacceptable.
Want sleep stats · 6 Aug 2026
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2/5meh
When I downloaded this app, I was under the impression that it would wake me up during lightest sleep, and I believe it advertised this as well. This was the biggest draw for me as I feel like I frequently wake up in the middle of deep sleep, which leads to me feeling very groggy. Now that I’m looking back through the app store page, it doesn’t appear to advertise “waking you up during lightest sleep” anymore - I’m assuming that’s because *it doesn’t actually do this.* I’ve been trying to use it for a few weeks now, and the alarm literally just goes off when I tell it to. No correlation with my actual deep sleep/light sleep. I’m pretty disappointed because I struggle a lot with this issue and was hoping this app would truly help me wake up at the end of my sleep cycle. It’s also never accurate despite me providing feedback, my time to sleep is ALWAYS 15 minutes and starts right when I open the app- it usually takes me way longer. I’m disappointed because I shelled out a considerable amount of money for this app, and it’s not doing much for me. Would love to hear back from the developers regarding why “wakes you during lightest sleep” is no longer a factor.
mrpotatohead14 · 6 Aug 2026
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5/5Most accurate of the five I've tried
I've used FitBit and Garmin and those have good built-in sleep trackers. I was disappointed after getting my Apple Watch that it doesn't have a built-in tracker, I reckon so they can make more money on app sales. Anyway, I tracked five different sleep tracking apps assiduously for three months and I can confidently say REM is in the top two (the other you could call SW). I give REM the top score for accuracy, the other app the top score for additional factor tracking such as HRV, blood O2, and respiration rate. REM is my top pick if you want a simple and accurate sleep tracker. It would be hard to beat and worth a sub if they added a couple more factors that the watch can track and provide to the app.
1DruncanM · 6 Aug 2026
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2/5Ok
I do like the layout, and seeing the info clearly is nice. I find this doesn’t do a great job of detecting light sleep and periods when I am awake. This leads to extended time documented falling sleep, and it doesn’t always count my actual am wake time if I wake up, turn off the alarm and go back to sleep within a few minutes. Used the free trial and will try other apps before possibly circling back. Would have paid for and given it a month or two if that were an option, but it’s not and I strongly dislike that the only option is 1 year purchase. That’s what sent me packing vs seeing if it evened out/improved over time honestly. If I find another app I like better, I won’t be back. I understand their 1 year policy brings in more $ for them initially, but it pushes out ppl like me on the fence after the 1 week trial who would have paid for a few months to give the app a fair shot. Shame, now I have to research other apps again :/ 2 stars is mostly for their year-only approach. I’d give the app itself somewhere around 3.5
noonewillreadanyway · 6 Aug 2026
Privacy & accessibility
App Store
Privacy
- Data Not Linked to You — Analytics — Identifiers — Device ID Developer declared
- Data Not Linked to You — Analytics — Usage Data — Product Interaction Developer declared
- Data Not Linked to You — App Functionality — Diagnostics — Crash Data Developer declared
- Data Not Linked to You — App Functionality — Health & Fitness — Fitness Developer declared
- Data Not Linked to You — App Functionality — Health & Fitness — Health Developer declared
- Data Not Linked to You — Diagnostics Developer declared
- Data Not Linked to You — Health & Fitness Developer declared
- Data Not Linked to You — Identifiers Developer declared
- Data Not Linked to You — Usage Data Developer declared
Accessibility
No accessibility labels collected yet.
Versions
App Store
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2.9
Bug fixes and performance improvements
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3.0
Adjustment Feature Added: When you reflect no, the adjustment page opens and help you to adjust your sleep pattern. Bug fixes and performance improvements.
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3.1
Adjustment Feature Added: When you reflect no, the adjustment page opens and help you to adjust your sleep pattern. Bug fixes and performance improvements.
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3.2
== New Features == + EDIT your sleep sessions + ADD a session manually when you forget wear your Apple Watch == Bug fixes == - Frequently asking to rate bug is solved - The sleep assessment bug is fixed and it works now - Other minor bugs fixed
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3.3
Bug fixed: Showing "No Sleep Session Detected" message when you wore your watch.
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3.4
== New Features == + EDIT your sleep sessions + ADD a session manually when you forget wear your Apple Watch
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3.5
New Metrics Added: - Environmental Sound Level - Respiratory Rate - Blood Oxygen The app reports measure the noise of the sleep environment, the frequency of your breath, and level of blood oxygen during the sleep now. Your Apple Watch should have the required sensors to detect these new metrics. - Environmental Sound Level for Apple Watch Series 3 and later - Respiratory Rate for Apple Watch Series 4 and later - Blood Oxygen for Apple Watch Series 6 and later
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3.6
New Metrics Added: - Environmental Sound Level - Respiratory Rate - Blood Oxygen The app reports measure the noise of the sleep environment, the frequency of your breath, and level of blood oxygen during the sleep now. Your Apple Watch should have the required sensors to detect these new metrics. - Environmental Sound Level for Apple Watch Series 3 and later - Respiratory Rate for Apple Watch Series 4 and later - Blood Oxygen for Apple Watch Series 6 and later
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3.7
Fixed an issue that could occasionally cause you get "No Sleep Session Detected." while you have a session. New Metrics Added: - Environmental Sound Level - Respiratory Rate - Blood Oxygen The app reports measure the noise of the sleep environment, the frequency of your breath, and level of blood oxygen during the sleep now. Your Apple Watch should have the required sensors to detect these new metrics. - Environmental Sound Level for Apple Watch Series 3 and later - Respiratory Rate for Apple Watch Series 4 and later - Blood Oxygen for Apple Watch Series 6 and later
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3.8
- Now you can log your daily mood to understand patterns in your mode changes - The Watch app bug is fixed.
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3.9
- Now you can log your daily mood to understand patterns in your mode changes - The Watch app bug is fixed.
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4.0
Big Update! Now you can track your REM. The sleep pattern diagram contains REM phase. A new card, Sleep Details, is added to show details of deep and REM phases of your sleep. Bug fix: No session issue is solved.
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4.2
Big Update! Now you can track your REM. The sleep pattern diagram contains REM phase. A new card, Sleep Details, is added to show details of deep and REM phases of your sleep. Bug fix: No session issue is solved.
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4.3
This update contains bug fixes for watchOS 9.2
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5.0
== SNORE Detection == Now, with the added feature of snore detection, you can identify if snoring is affecting your sleep quality and take necessary actions to improve it. Rem is also equipped with environment sound detection, so you can monitor the ambient noise levels and make adjustments for a more comfortable sleeping environment.
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6.0
We're excited to bring you our latest update, packed with fantastic improvements! Now, accessing and understanding your app metrics is easier than ever before. We've introduced a user-friendly dashboard that provides detailed insights into your app's performance. Each metric comes with a clear description, making it easier for you to understand their significance. But that's not all—we've also given the app a stunning makeover! It's now more visually appealing with vibrant colors, sleek animations, and an intuitive design. And to top it off, we've fixed several bugs, ensuring a smoother experience for you and your users. Get the latest update now to enjoy the prettier app, simplified metrics, and improved performance. Thank you for your continued support as we strive to provide you with the best app experience possible.
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6.1
We're excited to bring you our latest update, packed with fantastic improvements! Now, accessing and understanding your app metrics is easier than ever before. We've introduced a user-friendly dashboard that provides detailed insights into your app's performance. Each metric comes with a clear description, making it easier for you to understand their significance. But that's not all, we've also given the app a stunning makeover! It's now more visually appealing with vibrant colors, sleek animations, and an intuitive design. And to top it off, we've fixed several bugs, ensuring a smoother experience for you and your users. Get the latest update now to enjoy the prettier app, simplified metrics, and improved performance. Thank you for your continued support as we strive to provide you with the best app experience possible.
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6.3.0
We're excited to introduce an update that enhances your sleep experience with Rem, the smart autosleep tracker. In this version, we've focused on improving your understanding of your sleep patterns and overall sleep quality. Here's what's new: Introducing "Insight" Feature: Discover a deeper understanding of your sleep habits with our new "Insight" feature. This feature provides comprehensive trends and metrics analysis, allowing you to track the progress of your sleep quality over time. Gain valuable insights into how your routines impact your sleep patterns and make informed adjustments for better rest. Bug Fixes: We've addressed minor issues to ensure a smoother and more reliable sleep tracking experience.
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6.3.1
We're excited to introduce an update that enhances your sleep experience with Rem, the smart autosleep tracker. In this version, we've focused on improving your understanding of your sleep patterns and overall sleep quality. Here's what's new: Introducing "Insight" Feature: Discover a deeper understanding of your sleep habits with our new "Insight" feature. This feature provides comprehensive trends and metrics analysis, allowing you to track the progress of your sleep quality over time. Gain valuable insights into how your routines impact your sleep patterns and make informed adjustments for better rest. Bug Fixes: We've addressed minor issues to ensure a smoother and more reliable sleep tracking experience.
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6.3.2
We're excited to introduce an update that enhances your sleep experience with Rem, the smart autosleep tracker. In this version, we've focused on improving your understanding of your sleep patterns and overall sleep quality. Here's what's new: Introducing "Insight" Feature: Discover a deeper understanding of your sleep habits with our new "Insight" feature. This feature provides comprehensive trends and metrics analysis, allowing you to track the progress of your sleep quality over time. Gain valuable insights into how your routines impact your sleep patterns and make informed adjustments for better rest. Bug Fixes: We've addressed minor issues to ensure a smoother and more reliable sleep tracking experience.
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6.4.0
Bug Fixes: We've addressed minor issues to ensure a smoother and more reliable sleep tracking experience.
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6.5.0
- Resolved a lifetime premium restoration glitch. - Enhanced sleep tracking stability with minor bug fixes for a seamless experience.
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6.5.1
This version includes performance improvements and various bug fixes to enhance your experience.
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6.5.2
- Snore Detection Fix: Our snore detection feature is now back to working flawlessly after updating to iOS 18.2. Sweet dreams and snore-free insights are here again! - General performance improvements and minor bug fixes to keep things running smoothly.
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6.5.3
· 30 Sep 2025
- Fixed a crash issue on iOS 26 - General improvements and optimizations for a smoother experience
Alternatives
- Sleep Details — Same category + similar ratings
- Sleep++ — Same category + similar ratings
- NapBot - Auto Sleep Tracker — Same category + similar ratings
- SleepWatch - Top Sleep Tracker — Same category + similar ratings
- SleepScore by Sleep.ai — Same category + similar ratings
- Pillow: Sleep Tracker — Same category + similar ratings
Availability by market
- US
Data quality & evidence
- Page completeness
- Live store listing
- Last verified
- 6 Aug 2026
- Sources
- App Store
- Independent summary has not been published yet.