Comparison

Pillow vs Sleep Tracker

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 analyzes your sleep cycles automatically using your Apple Watch, iPhone, or iPad. It functions as a smart alarm to wake you at your lightest sleep stage and records audio events like snoring. Explore sleep trends and compare your quality with Apple Health metrics.

Highlights
  • Automatic sleep tracking
  • Smart alarm clock
  • Snore and sound recording
  • 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 Tracker

This app helps you improve your sleep with white noise, guided stories, and breathing exercises. Track your sleep duration and quality with detailed reports to understand your rest patterns and make informed adjustments for a healthier lifestyle.

Highlights
  • Customizable white noise mixes
  • Library of sleeping stories
  • Sleep duration and quality tracking
  • Detailed sleep reports and trends
  • Guided breathing exercises
  • AI dream analysis
Features
Read full description

Unlock the Secrets of Restful Sleep! Key Features: • White Noise: Immerse yourself in tranquility with our app. Effortlessly drift off to sleep with our extensive collection of soothing white noise. Customize your perfect sleep environment by mixing up to 8 different white noises, each with independent volume control. • Sleeping Stories: Indulge in a treasure trove of literary masterpieces and beautiful prose. Embark on a journey to dreamland with our rich library of classic novels and captivating essays, each carefully selected to soothe your mind and prepare you for a peaceful slumber. • Sleep Tracker: Our user-friendly interface makes it easy to monitor your sleep duration and quality, providing the data you need to make informed adjustments for a healthier lifestyle. • Sleep Report: Gain insights into your sleep quality, duration, and trends over time with our comprehensive sleep statistics. Stay on top of your sleep health for a better life. • Breathing Exercises: Relax and prepare for sleep with our guided breathing exercises. Adjust your breathing patterns with pre-set templates designed to help you achieve relaxation and balance. Download now to unlock the secrets of rejuvenating sleep. Join our community and experience the blissful world of peaceful slumber. SUBSCRIPTION INFO: Subscribe to access all features, tools, and content. • Subscription lengths: Weekly, yearly • Your payment will be charged to your iTunes Account upon confirmation of purchase. • Manage your subscriptions and turn off auto-renewal from your Account Settings after purchase. • Your subscription will automatically renew unless you turn off auto-renew at least 24 hours before the current period ends. • Renewal cost will be charged to your account within 24 hours before the current period ends. • Manage your membership and turn off auto-renew from your Apple account. • When canceling a subscription, it remains active until the end of the period. Auto-renewal will be disabled, but the current subscription is non-refundable. • Any unused portion of a free trial, if offered, will be forfeited upon purchasing a subscription. Terms of Service: https://www.xiaoyaohuyu.tech/TopSleepTracker/TSTTermsOfService.html Privacy Policy: https://www.xiaoyaohuyu.tech/TopSleepTracker/TSTPrvacyPolicy.html Have a feature request for a future version of the app? Contact us at xiaoyaohuyu@sina.cn

Screenshots

Pillow4 screens
Sleep Tracker4 screens

Verdict

The call

The clearest difference is ads: Pillow at none against Sleep Tracker's shown. Pillow also leads on ratings volume (96K vs 77) and chart position (#167 vs unranked). Sleep Tracker's advantage is review sentiment (71% vs 42%). On price, rating, update cadence 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 5 in-app purchases, starting at $19.99 per month and Sleep Tracker sells 3 in-app purchases, starting at $4.99 per 7 days. 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 4.5 for Sleep Tracker. That said, the two scores are not equally well evidenced: Pillow has 96K ratings behind it against 77, so its average is the more settled of the two. Written reviews are what separate them: 42% of Pillow's written reviews are positive against 71% of Sleep Tracker's.

UpkeepUpdate frequency

Pillow ships an update every 9 days, Sleep Tracker every 2 weeks. The most recent releases landed on November 4, 2026 and November 3, 2026 respectively.

Scorecard5 real differences · 6 level
Pillow versus Sleep Tracker: the parameters behind the verdict, then further details
ParameterPillowSleep Tracker
PriceFreeFree
Rating4.4 (96K ratings)4.5 (77 ratings) — better
Positive reviews41.8% of reviews71.4% of reviews — better
Number of ratings96K — better77
Update frequencyEvery 9 days — betterEvery 2 weeks
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
Best chart rank#167 — better—
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS17.016.0 — better
Further details — not scored
Size691 MB112 MB
Age rating12+9+
DeveloperNeybox Digital Ltd.Xiaoyao Apps

Customer experience

Pillow

All ratings95,807 ratings
Positive84.6%
Neutral6.5%
Negative8.8%
Written reviews1,623 reviews
Positive41.8%
Neutral9.2%
Negative48.9%

Sleep Tracker

All ratings77 ratings
Positive87.0%
Neutral6.5%
Negative6.5%
Written reviews7 reviews
Positive71.4%
Neutral0.0%
Negative28.6%

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 Tracker

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 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
3 purchases

Sleep Tracker

Subscriptions3
  • Top Sleep Premium3 Days trial$4.997 Days
  • Top Sleep Premium$24.991 Year
  • Top Sleep Premium$49.991 Year

Questions

Is Pillow free?
Pillow is free to download, with in-app purchases available.
Is Sleep Tracker free?
Sleep Tracker is free to download, with in-app purchases available.
Which has better reviews, Pillow or Sleep Tracker?
Sleep Tracker is rated higher. Pillow averages 4.4 out of 5 from 96K ratings, while Sleep Tracker averages 4.5 from 77 ratings.
Do Pillow or Sleep Tracker have ads?
Sleep Tracker shows ads; Pillow does not.
Which is updated more often, Pillow or Sleep Tracker?
Pillow ships an update every 9 days, and Sleep Tracker every 2 weeks. Most recently, Pillow was updated on November 4, 2026 and Sleep Tracker on November 3, 2026.

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