Comparison

Pillow vs Sleep Details

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

Head to head
About

Pillow

This app helps you understand and improve your sleep. It automatically tracks your sleep cycles, analyzes heart rate, and records audio events like snoring. Get personalized insights and tips to wake up feeling refreshed.

Highlights
  • Automatic sleep tracking
  • Smart alarm clock
  • Snore and sleep talking recorder
  • Sleep cycle analysis
  • Heart rate analysis
  • Personalized sleep tips
  • Sleep aid library
Features
Read full description

Sleep trouble? Sleep better with Pillow, your smart sleep tracker. Pillow can analyze your sleep cycles automatically using your Apple Watch, iPhone or iPad. Use Pillow as a smart alarm clock to wake up at the lightest possible sleep stage and start your day refreshed and relaxed. Record important audio events such as snoring, sleep apnea, and sleep talking. Explore trends about your sleep and compare your sleep quality with many Apple Health metrics that affect sleep. As seen on: The New York Times, Forbes, The Guardian, BuzzFeed, The Washington Post, TechCrunch, MacStories, Daily Mail, and many more. Rated as one of the best sleep tracking apps for the Apple Watch and iPhone. Join the millions that have discovered the life-changing benefits of great sleep! TRACK YOUR SLEEP AUTOMATICALLY - Simply wear your Apple Watch during sleep. Pillow will automatically detect and analyze your sleep. - View last night's report right on your Apple Watch, along with the heart rate analysis for the night. - Switch between manual and automatic mode anytime. SLEEP CYCLE & HEART RATE ANALYSIS - Advanced sleep cycle analysis algorithm based on the latest scientific findings in sleep research. - Detailed heart rate analysis - Detailed sleep stage diagram (Awake, REM, Light Sleep, Deep Sleep) and sleep score. - Home Screen, Lock Screen Widgets and Apple Watch Complications AUDIO RECORDINGS USING MACHINE LEARNING - Snoring, sleep apnea, sleep talking and other nightly sounds. - All processing is done using on-device intelligence to ensure privacy. PERSONALISED INSIGHTS & SLEEP TIPS - Create a unique personal sleep program to reach your goals - Regularly updated sleep tips - Advanced Insights, including optimal bedtime, chronotype and more. SLEEP TRENDS - Explore your sleep history with Week, Month, Year, and All Time overviews. - Compare your sleep quality with many Apple Health categories that affect sleep. BACKUP & SYNCHRONIZE - Synchronize and backup your sleep data and audio recordings between your devices. ALARM PRESETS & NAPS - Powernap, recovery, and full-cycle nap - Customisable alarm presets MOOD & NOTES - Track your mood when you wake up - Discover how your notes affect your sleep quality SLEEP AID - Access an expanding library of Meditations, Bedtime Stories, Soundscapes and Music. - Use a track from Apple Music or iTunes as an alarm. - Siri Wind Down support PREMIUM FEATURES: - Unlimited sleep history & analysis - Advanced sleep analysis - Sleep trends & Apple Health comparison - Sleep notes - Heart rate analysis - Sound recordings - Nap modes & Customisable presets - Access to Sleep aid library - Access to all wake-up melodies - Discover: Create a personalised sleep program. - Wake-up melodies from your iTunes library or Apple Music - Data export in CSV format - Smart Wake-up Learn more at https://pillow.app 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. If you start a free trial, you will be charged automatically at the end of the trial period unless you cancel 24 hours before the expiration period. Your subscription will renew automatically unless you turn off auto-renew at least 24 hours before the end of the current period. The renewal cost will be charged to your account within 24 hours before 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 existing subscription will not be refunded. If offered, any unused portion of a free trial period will be forfeited when purchasing a subscription. Terms & Privacy Policy: https://pillow.app/pillow-privacy-policy-en

About

Sleep Details

Track your sleep data and receive a daily sleep score based on information from your Apple Watch. Gain insights into sleep stages, heart rate, and more, with personalized ratings and factor tagging. Features a memory test and daily summaries for enhanced understanding of your sleep's impact.

Highlights
  • Daily sleep score
  • Detailed sleep metrics
  • Personalized sleep rating
  • Sleep factor tagging
  • Morning notifications
  • Memory test
  • Daily sleep summaries
Features
Read full description

Track your sleep related data and see your daily sleep score based on data collected by your Apple Watch. Sleep Details requires an Apple Watch with watchOS 10 or later installed. Sleep Details integrates with the Health app and uses data stored in the Health app. Key features: -Daily sleep score based on sleep duration and other relevant sleep related data -See details of the following sleep related data: Sleep stages and times, Activity while sleeping, Heart rate, Heart rate variability, Respiratory Rate, Blood oxygen levels (SpO2 data is available only on Apple Watch series 6 or later devices), Wrist Temperature (only available on Apple Watch series 8 and Apple Watch Ultra devices ) -Privacy: We do not collect any data from your devices -Receive morning notifications with last nights sleep score and sleep duration -Rate your sleep. Your personal feeling based rating will also adjust your daily score -Tag your sleep with factors that possibly affected your sleep. For example if you feel that caffeine affected your sleep you can tap the caffeine icon to tag your sleep -Add naps: In the iPhone app you can add naps that Sleep Details has detected. You can also add naps manually. Your naps duration will contribute to your daily sleep duration and therefore affect your daily score and sleep dept calculations. -Night Mode: If you open Sleep Details during the night, you will see your most recent 4 hour Heart Rate, Heart Rate Variability and Blood Oxygen (Series 6 or later) averages. -Daily Sleep Summary: Devices that support Apple Intelligence can use the 'Generate summary' feature to generate a daily sleep summary with additional insights (iOS 26 required). -Sleep has an important role in the performance of your memory. To highlight this, we added a simple memory test in Sleep Details: 1) Before going to bed try memorize a set of icons and their location. 2) Then after waking up, try remember and fill in these items. 3) New icons and locations will be generated for each day, so you can track your long-term progress by completing a new test each day. -Add Sleep Details as a complication on your watch faces -On your Apple Watch you can tap different metrics to see more details -Two week sleep score trend available on your iPhone. You can tap different days to see the sleep details of the selected day -On your iPhone you can tap different metrics to get a description of the selected metric -History view with your all-time averages and min/max values for all available sleep related data -After your free seven day trial has ended you can continue to use the app by purchasing monthly subscription or the "Lifetime access" in-app purchase. Purchases can also be made before the trial ends by tapping the trial end date.  -"Lifetime access" and monthly subscription purchases will also unlock the Sleep Details toolbar and comparison charts Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula How are different health metrics used to calculate your last nights sleep score? As an example your score will be lower if your last nights heart rate average is higher than your weekly resting heart rate average. In this case the heart rate ring will be colored red so you can easily spot which metrics are negatively affecting your score. If you have any questions we will happily help you: contact@sydvesti.com

Screenshots

Pillow4 screens
Sleep Details4 screens

Verdict

The call

The clearest difference is ratings volume: Pillow at 96K against Sleep Details's 1.1K. Pillow also leads on update cadence (every 2 weeks vs every 2 months) and chart position (#145 vs unranked). Sleep Details's advantage is review sentiment (50% vs 41%). On price, rating, ads and in-app purchases 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. Pillow sells 6 in-app purchases, starting at $19.99 per month and Sleep Details sells 3 in-app purchases, starting at $2.99 per month. 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 — 4.4 for Pillow against 4.4 for Sleep Details. That said, the two scores are not equally well evidenced: Pillow has 96K ratings behind it against 1.1K, so its average is the more settled of the two. Written reviews are what separate them: 41% of Pillow's written reviews are positive against 50% of Sleep Details's.

UpkeepUpdate frequency

Pillow ships an update every 2 weeks, Sleep Details every 2 months. The most recent releases landed on September 24, 2026 and September 23, 2026 respectively.

Scorecard4 real differences · 7 level
Pillow versus Sleep Details: the parameters behind the verdict, then further details
ParameterPillowSleep Details
PriceFreeFree
Rating4.4 (96K ratings)4.4 (1.1K ratings)
Positive reviews41.4% of reviews50.0% of reviews — better
Number of ratings96K — better1.1K
Update frequencyEvery 2 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
Best chart rank#145 — better
DevicesiPhone, iPad, Apple Watch — betteriPhone, Apple Watch
Requires iOS17.0 — better18
Further details — not scored
Size692 MB19 MB
Age rating12+4+
DeveloperNeybox Digital Ltd.Sydvesti Oy

Customer experience

Pillow

All ratings95,673 ratings
Positive84.7%
Neutral6.5%
Negative8.8%
Written reviews1,557 reviews
Positive41.4%
Neutral9.4%
Negative49.1%

Sleep Details

All ratings1,053 ratings
Positive83.9%
Neutral7.4%
Negative8.7%
Written reviews52 reviews
Positive50.0%
Neutral9.6%
Negative40.4%

User reviews

Pillow

From 96K App Store ratings

What we love

  • 👍 Helpful for tracking sleep patterns
  • 🚀 Automatic sleep detection
  • 🎨 Colorful and intuitive interface
  • 📊 Detailed sleep data and analysis
  • 🔊 Audio recording of sleep sounds

Room to improve

  • 🐛 Inaccurate sleep tracking
  • 🔒 Paywall for basic features
  • 🔋 High battery consumption
  • 🤔 Confusing alarm and nap features
  • 🤷‍♀️ Inconsistent sync between watch and phone

Sleep Details

From 1.1K App Store ratings

What we love

  • 👍 Great interface
  • 👍 Helpful for understanding sleep
  • 👍 Good for blind users

Room to improve

  • 🐛 App not working/tracking properly
  • 🐛 Sleep time/data inaccurate
  • 🔒 Subscription/payment issues
  • 🔋 Drains battery

Bugs and requests

Pillow

Reported bugs

4 issues
  • App crashes or freezes
  • Sleep data not syncing properly
  • Audio recording issues
  • Alarm not working as expected

Requested features

4 requests
  • Ability to edit sleep sessions and data
  • Sleep cycle trends and insights
  • Dream journal integration
  • More customization options for alarms and sounds

Sleep Details

Reported bugs

3 issues
  • Sleep stage section disappeared
  • App keeps kicking user out
  • Widget doesn't update with current data

Requested features

4 requests
  • Add ability to log naps
  • Improve widget updates
  • Provide more explanation of sleep metrics
  • Implement REM sleep tracking

In-app purchases

6 purchases

Pillow

Subscriptions5
  • Pillow Premium - Monthly$19.991 Month
  • Premium Sleep Tracking7 Days trial$39.991 Year
  • Pillow Premium - Annual$39.991 Year
Show 2 more
  • Pillow Premium - Annual1 Year trial$39.991 Year
  • Pillow Premium - Quarterly$59.993 Months
One-time1
  • Pillow Premium - Legacy$249.99
3 purchases

Sleep Details

Subscriptions2
  • Monthly subscription$2.991 Month
  • Yearly subscription$29.991 Year
One-time1
  • Lifetime Access$59.99

Questions

Is Pillow free?
Pillow is free to download, with in-app purchases available.
Is Sleep Details free?
Sleep Details is free to download, with in-app purchases available.
Which has better reviews, Pillow or Sleep Details?
Pillow and Sleep Details are both rated 4.4 out of 5 on the App Store, from 96K and 1.1K ratings respectively.
Do Pillow or Sleep Details have ads?
Neither Pillow nor Sleep Details shows ads.
Which is updated more often, Pillow or Sleep Details?
Pillow ships an update every 2 weeks, and Sleep Details every 2 months. Most recently, Pillow was updated on September 24, 2026 and Sleep Details on September 23, 2026.

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