Comparison

AutoSleep vs retimer

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

Head to head
About

AutoSleep

Automatically tracks your sleep using your Apple Watch without manual input. Offers detailed insights into sleep duration, quality, and various physiological metrics. Integrates with Apple Health and provides smart alarm features.

Highlights
  • Automatic sleep tracking
  • Detailed sleep analysis
  • Sleep Stages integration
  • Smart alarm
  • Privacy focused
  • Heart rate and respiration tracking
  • Wrist temperature monitoring
Features
Read full description

Automatically track your sleep from your Apple Watch*. No buttons to press. Even the Watch app is optional! Just sleep! Total Privacy. ------------- AutoSleep has no user analytics tracking. No advertising plugins. No 3rd party code. No data upload. Ask your "free" sleep app if they can say the same. Everything Included. -------------------- No extra In App Purchases. No subscriptions. Apple Sleep Stages ----------------- Full integration with Sleep Stages from the Apple Sleep app, so you have the option to use the Apple Sleep app and view all the information in AutoSleep. Functions ----------------- AutoSleep includes all the information and functionality you need for sleep monitoring, including: Time Asleep – sleep duration and sleep bank balance Sleep Rating – a consolidated rating score of your sleep Sleep Rings – fill your sleep rings with quality sleep, including heart rate, deep sleep and REM Apple Sleep Stages – option to use the data from the Apple Sleep app Sleep Apnea - discover if you have sleep apnea Sleep Blood Oxygen – measurements while sleeping Respiration Rate – track your breathes per minute Noise – environmental noise measurements Sleep Analysis – view detailed graphs and breakups on your sleep cycles Sleep Fuel – measure the quality and efficiency of your sleep Snoring Intensity - using the AutoSnore app, view how snoring impacts your sleep quality Tonight’s Bedtime – recommends your latest bedtime based on your habits Readiness – indicates your physical and mental stress Temperature – track your sleeping wrist temperature Sleep Consistency – learn about your time to bed behaviours Lights Off – track the time to fall asleep Live Sleep Tracking – view your sleep statistics during the night Smart Alarm – Watch in-built smart alarm to help you wake in lighter sleep Widgets – fantastic range of iPhone widgets Complications – multiple Watch face options HomeKit – full integration with Apple HomeKit Emojis & Notes – record comments and tags to your sleep session Explore – deep dive analytics views Siri – use with Siri voice commands Shortcuts – create your own shortcuts that you use with AutoSleep Adjust – a simple function to adjust sleep/wake detection individual to you History – advanced graphs and trends Configuration – change the theme and design your clock sleep rings Setup – customise your sleep goals, setup notifications and reminders Exports – exporting options to save your data About AutoSleep ----------------- Using Advanced Heuristics AutoSleep works out how long you've slept so you don't have to. If you DO wear your Watch to bed, you don't need to do a single thing. AutoSleep will track your sleep & quality and send you a notification in the morning. Even if you don't wear your Watch to bed, AutoSleep can track your time in bed. It's extremely simple. If you DON'T wear your Watch to bed, then simply take your Watch off before you go to sleep. As soon as you touch your iPhone or put your Watch back on in the morning then AutoSleep will know that you have finished sleeping. As everyone is a little bit different. AutoSleep provides a simple setup wizard and an option to tweak if you are a very restless sleeper. AutoSleep also integrates beautifully with the Eclipse Yourself and HeartWatch apps, our premier heart, health, activity, recovery and readiness monitoring apps. *Requires Apple Watch running WatchOS 4 or higher. Awards ----------------- Best of 2018 https://apps.apple.com/story/id1438574124/ Best of 2019 https://apps.apple.com/story/id1484100916/ Best of 2020 https://apps.apple.com/story/id1535572713/ Best of 2021 https://apps.apple.com/story/id1591083005/ Best of 2022 https://apps.apple.com/story/id1654240446 Best of 2023 https://apps.apple.com/story/id1719170110

About

retimer

This app helps manage and monitor your circadian rhythm to improve sleep and energy levels. It works with a light therapy wearable to address issues like jet lag, irregular work hours, and general sleep difficulties.

Highlights
  • Circadian rhythm management
  • Sleep monitoring
  • Energy level improvement
  • Jet lag adjustment
  • Light therapy integration
Features
Read full description

Sleep Better, Feel Energized, Be Your Best Self: Welcome to the cutting-edge approach to wellness with retimer app. retimer app together with our Re-Timer light therapy wearable provides a simple method to manage, monitor & align your circadian rhythm with your lifestyle challenges – jet lag, odd working hours, inability to sleep or awaken on time, & poor sleep in general.

Screenshots

AutoSleep4 screens

Verdict

The call

The clearest difference is review sentiment: AutoSleep at 80% against retimer's 0%. AutoSleep also leads on rating (4.7 vs 2.0) and ratings volume (62K vs 1). retimer's advantage is price (Free vs $8.99) and update cadence (every 3 weeks vs every 2 months). On ads, in-app purchases and device support 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

retimer is free to download; AutoSleep costs $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

AutoSleep holds the better App Store score, 4.7 against 2.0. That said, the two scores are not equally well evidenced: AutoSleep has 62K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 80% of AutoSleep's written reviews are positive against 0% of retimer's.

UpkeepUpdate frequency

AutoSleep ships an update every 2 months, retimer every 3 weeks. The most recent releases landed on September 25, 2026 and September 17, 2026 respectively.

Scorecard8 real differences · 3 level
AutoSleep versus retimer: the parameters behind the verdict, then further details
ParameterAutoSleepretimer
Price$8.99Free — better
Rating4.7 (62K ratings) — better2.0 (1 ratings)
Positive reviews79.7% of reviews — better0.0% of reviews
Number of ratings62K — better1
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#1 — better—
DevicesiPhone, iPod, Apple WatchiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size38 MB108 MB
Age rating4+4+
DeveloperTantsissaRe-Time Pty Ltd

Customer experience

AutoSleep

All ratings61,666 ratings
Positive94.5%
Neutral1.4%
Negative4.2%
Written reviews3,996 reviews
Positive79.7%
Neutral5.1%
Negative15.2%

retimer

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

AutoSleep

Reported bugs

4 issues
  • App crashes or stops working after updates
  • Sleep data disappearing or not syncing properly
  • Incorrect sleep time and wake up detection
  • Issues with Apple Watch connectivity and data transfer

Requested features

5 requests
  • Add support for REM sleep tracking
  • Improve smart alarm functionality
  • Allow setting custom sleep/wake time windows
  • Add more personalization and customization options
  • Improve integration with other health/fitness apps

retimer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

AutoSleep

No in-app purchases

None

retimer

No in-app purchases

Questions

Is AutoSleep free?
AutoSleep costs $8.99, with no in-app purchases.
Is retimer free?
retimer is free to download, with no in-app purchases.
Which has better reviews, AutoSleep or retimer?
AutoSleep is rated higher. AutoSleep averages 4.7 out of 5 from 62K ratings, while retimer averages 2.0 from 1 ratings.
Do AutoSleep or retimer have ads?
Neither AutoSleep nor retimer shows ads.
Which is updated more often, AutoSleep or retimer?
AutoSleep ships an update every 2 months, and retimer every 3 weeks. Most recently, AutoSleep was updated on September 25, 2026 and retimer on September 17, 2026.

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