Comparison

Study Tracker vs Sleep Cycle Calculator

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

Head to head
About

Study Tracker

This app helps you track your study time, set custom courses and plans, and utilize various timers like Pomodoro and countdown for efficient learning. It offers detailed statistics, white noise for focus, and exam countdowns with widgets. Data syncs across devices via iCloud.

Highlights
  • Track study time
  • Customize courses and study plans
  • Pomodoro and countdown timers
  • Detailed study statistics
  • White noise for focus
  • Exam countdowns and widgets
  • Multi-device iCloud sync
Features
Read full description

Study Tracker helps you focus on learning and see where your study time goes. Whether you are preparing for exams, working toward a qualification, or learning on your own, start with one focused session. Track time by subject and review your daily and weekly effort. STUDY BY SUBJECT Create subjects and study plans for reading, lectures, practice questions, review, and more. Record time for each activity and see how you divide your effort. FIND YOUR FOCUS Choose a full-screen clock, stopwatch, countdown timer, or Pomodoro timer. Switch between flip-clock and digital displays to suit reading, timed practice, or focused study. SEE YOUR EFFORT ADD UP Review your study calendar, daily and weekly statistics, and time spent on different subjects. Add missed sessions manually and create a study poster to save or share. KEEP YOUR EXAM DATE IN VIEW Set your target date and see how many days remain. Add countdown widgets to your Home Screen and Lock Screen to keep your goal in sight. Lock Screen widgets require iOS 16 or later. MAKE IT YOUR STUDY SPACE Choose a theme, adjust the clock's text size, colors, and display options, and settle in with rain, wind, or river sounds. SYNC AND KEEP YOUR TIMER VISIBLE Sync study records between iPhone and iPad using the same Apple Account with iCloud enabled. Picture in Picture lets you keep a timer visible while using other apps, on supported devices and systems. Start with one session today. Give your effort a record you can look back on. PREMIUM AND PURCHASES Study Tracker is free to download and includes basic timing and study recording. Premium unlocks unlimited subjects and study plans, detailed statistics, additional customization, and more. Premium is available through a monthly auto-renewable subscription or a one-time lifetime purchase. The subscription period is one month. The price and currency are displayed before purchase and confirmed by the App Store. Payment is charged to your Apple Account when you confirm the purchase. Monthly subscriptions renew automatically until canceled. Manage or cancel in Settings > your Apple Account > Subscriptions. Canceling renewal normally preserves access until the end of the current paid period. A lifetime purchase is a one-time payment with no automatic renewal. Buying lifetime Premium or deleting the app does not cancel an existing monthly subscription. Manage that subscription separately. Use Restore Purchases in the app to restore eligible purchases. Terms of Use: https://www.gudelabs.com/study-tracker/en/terms.html Privacy Policy: https://www.gudelabs.com/study-tracker/en/privacy.html Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Contact: zach@gudelabs.com

About

Sleep Cycle Calculator

This app helps you improve sleep habits by calculating optimal sleep and wake times based on sleep cycles and desired duration. It also offers sleep sounds to aid in falling asleep faster and achieving deeper rest.

Highlights
  • Sleep cycle calculation
  • Optimal sleep duration calculation
  • Variety of sleep sounds
  • User-friendly interface
  • Subscription for unlimited access
Features
Read full description

Sleep Timer: Calculator, Sounds helps you calculate bedtime and wake-up options based on your sleep schedule. Main Features: • Calculate bedtimes and wake-up times by sleep cycle. • Calculate sleep schedules by preferred duration. • Customize fall-asleep time and cycle length. • Play sleep sounds with an optional timer. Disclaimer: Sleep Timer: Calculator, Sounds provides sleep schedule calculations for informational purposes only. It is not a medical device and does not provide medical advice, diagnosis, or treatment. SUBSCRIPTION INFORMATION An optional subscription gives you unlimited access to all app features during the active subscription period. A one-time purchase option may also be available for lifetime access. • Payment will be charged to your Apple Account at confirmation of purchase. • The subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. • Your account will be charged for renewal within 24 hours before the end of the current period. • You can manage or cancel your subscription in your App Store account settings after purchase. • Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription, where applicable. Privacy Policy: https://13520178.github.io/sleepcalculator/policy.html Terms of Use: https://13520178.github.io/sleepcalculator/terms.html Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ For questions or support, contact us at: phannhatd@gmail.com

Screenshots

Study Tracker4 screens
Sleep Cycle Calculator3 screens

Verdict

The call

The clearest difference is rating: Sleep Cycle Calculator at 4.7 against Study Tracker's 4.1. Sleep Cycle Calculator also leads on review sentiment (71% vs 51%). Study Tracker's advantage is update cadence (every 10 days vs every 2 months). On price, ratings volume, 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. Study Tracker sells 2 in-app purchases, starting at $0.99 per month and Sleep Cycle Calculator sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Sleep Cycle Calculator holds the better App Store score, 4.7 against 4.1. Both are backed by a comparable volume of ratings — 29 and 15 respectively. Written reviews point the same way: 51% of Study Tracker's written reviews are positive against 71% of Sleep Cycle Calculator's.

UpkeepUpdate frequency

Study Tracker ships an update every 10 days, Sleep Cycle Calculator every 2 months. The most recent releases landed on October 12, 2026 and September 25, 2026 respectively.

Scorecard3 real differences · 7 level
Study Tracker versus Sleep Cycle Calculator: the parameters behind the verdict, then further details
ParameterStudy TrackerSleep Cycle Calculator
PriceFreeFree
Rating4.1 (29 ratings)4.7 (15 ratings) — better
Positive reviews50.8% of reviews71.4% of reviews — better
Number of ratings29 — better15
Update frequencyEvery 10 days — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size14 MB4 MB
Age rating4+4+
DeveloperShenzhen Gude Aipu Technology Co., LtdPhan Nhat Đang

Customer experience

Study Tracker

All ratings29 ratings
Positive75.9%
Neutral0.0%
Negative24.1%
Written reviews65 reviews
Positive50.8%
Neutral18.5%
Negative30.8%

Sleep Cycle Calculator

All ratings15 ratings
Positive93.3%
Neutral0.0%
Negative6.7%
Written reviews7 reviews
Positive71.4%
Neutral0.0%
Negative28.6%

In-app purchases

2 purchases

Study Tracker

Subscriptions1
  • Premium (Month)$0.991 Month
One-time1
  • Premium (Lifetime)$4.99
3 purchases

Sleep Cycle Calculator

Subscriptions2
  • 1-Month Subscription$1.991 Month
  • 1-Year Subscription$9.991 Year
One-time1
  • Unlock all features$17.99

Questions

Is Study Tracker free?
Study Tracker is free to download, with in-app purchases available.
Is Sleep Cycle Calculator free?
Sleep Cycle Calculator is free to download, with in-app purchases available.
Which has better reviews, Study Tracker or Sleep Cycle Calculator?
Sleep Cycle Calculator is rated higher. Study Tracker averages 4.1 out of 5 from 29 ratings, while Sleep Cycle Calculator averages 4.7 from 15 ratings.
Do Study Tracker or Sleep Cycle Calculator have ads?
Neither Study Tracker nor Sleep Cycle Calculator shows ads.
Which is updated more often, Study Tracker or Sleep Cycle Calculator?
Study Tracker ships an update every 10 days, and Sleep Cycle Calculator every 2 months. Most recently, Study Tracker was updated on October 12, 2026 and Sleep Cycle Calculator on September 25, 2026.

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