Comparison

Study Sprint Timer vs Yanlış Defteri

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

Head to head
About

Study Sprint Timer

This app helps students focus on their studies with a customizable timer and progress tracking. Gamified elements like a growing owl and leaderboards encourage consistent effort. It also supports reading goals and offers various customization options.

Highlights
  • Customizable study sprints
  • Gamified progress tracking (owl, village)
  • Exam planning and reminders
  • Reading session tracking
  • Lock Screen and Dynamic Island integration
  • Apple Watch app
  • Data export to CSV and Apple Health
Features
Read full description

Study every day and your scholarly owl thrives. Skip a day and it misses you. Study Sprint Timer is a study timer for students working toward finals, the SAT, the ACT or GCSEs. You don't need an account, and it works offline. Add your exam in Plan and the days left stay in front of you. You see your week on one screen, move a missed task to another day, and set reminders. In Progress, your rival is you from last month. Shadow week draws the day-by-day median of your last four weeks, so you can see whether this week is ahead or behind. Your year heatmap, weekly chart, personal records, the leaderboard and your streak calendar are there too. You open it and start with one tap. Pick a 20 or 40 minute sprint, or set a length of your own. When you cannot tell how long the library day will run, switch to Free Study: an open-ended stopwatch that counts toward your streak and picks up where it left off even after a force quit. The timer sits on the Lock Screen and in the Dynamic Island, with pause and finish buttons right there. The Apple Watch app has a timer of its own. Studying earns coins. Coins are never sold; the only way to get them is to study. In the Village you walk through the rooms your owl has unlocked, and the wardrobe lets you try colors and accessories on it before you choose. Campus Style, the first cosmetic pack in the Shop, is a separate purchase and is not part of Premium. If you came here to read, say so during setup and the app reshapes itself around it: your current book on the home screen, pages instead of coursework. You start a session with a book and, if you want, a page goal, and the summary tells you how far you got. It measures your own pace to estimate how much reading time the book has left. Set a yearly book goal in the Library and watch your library fill up. You decide how it looks. There are 26 light and dark themes, and you can preview each one across the whole app before committing; the app icon changes colour along with the theme. You name the categories yourself: maths, English, software, whatever you happen to be studying. There are snooze-able smart alarms and motivation reminders. You can export your whole history as CSV, and write finished sessions to Apple Health as mindful minutes. It was built with high school and university students, self-learners and bootcamp students in mind. It works just as well if you are preparing for IELTS or if you simply like the pomodoro rhythm. Your sessions and notes stay on your phone. Your owl, plans, books and categories are backed up to our own server so they come with you to a new phone. After your third 10-minute session you join the leaderboard under a random name, and you can leave it any time. Analytics runs only if you allow it and never collects what you study. Premium is optional. It removes ads, unlocks every theme and opens Deep analysis: an hour map, focus quality, a 12-week trend, and exam pace, which shows how much you will have studied by exam day at your current rate. With Focus ambiance the focus screen follows the time of day. It also keeps an independent developer going. Something feels off? Tell us from Settings. We read every message. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Yanlış Defteri

Features
Read full description

Yanlış Defteri is a mistake notebook for middle and high school students preparing for exams. See your weak spots, organize your reviews and stop repeating the same mistakes. SAVE YOUR MISTAKES - Take a photo of a question you got wrong or pick it from your gallery. - Add subject, topic, source and the correct answer; leave a short note or a voice note. - Keep the solution photo together with the question. REVIEW REGULARLY - Each mistake comes back on a spaced repetition schedule. - Get a reminder when questions are due for review. - Track solved, repeated and learned questions separately. SEE YOUR GAPS - See which subjects and topics you miss most. - Record practice exam results and follow your progress. - Share a subject report with your teacher or parent. YANLIŞ DEFTERİ PRO - Pen removal: erases handwriting and marks from a question so it looks blank again. First 3 cleanings are free. - AI cleaning: clean results even on difficult pages. - Blank-page test: re-solve your mistakes on cleaned pages. - Auto scan and text search. - Printing with a mini thermal printer (20 free prints). - Automatic backup to your own iCloud Drive. Pro is available as monthly, yearly (7-day free trial) and lifetime one-time purchase. Subscriptions renew automatically at the end of each period unless cancelled; cancel anytime in Settings > Apple Account > Subscriptions. PRIVACY Question photos and study records stay on your device. Only if you explicitly agree to use server or AI pen removal in Pro, the question photo to be cleaned is sent for processing and is not stored. No accounts, ads, location, contacts or tracking. Privacy Policy: https://www.yanlisdefteri.com.tr/en/privacy.html Terms of Use: https://www.yanlisdefteri.com.tr/en/terms.html

Screenshots

Study Sprint Timer4 screens
Yanlış Defteri4 screens

Verdict

The call

The clearest difference is ads: Yanlış Defteri at none against Study Sprint Timer's shown. Yanlış Defteri also leads on iOS requirement (13.0 vs 18.0). Study Sprint Timer's advantage is update cadence (every 6 days vs every 2 weeks). On price, 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

Both are free to download. Study Sprint Timer sells 3 in-app purchases, starting at $3.99 per month and Yanlış Defteri sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Study Sprint Timer ships an update every 6 days, Yanlış Defteri every 2 weeks. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 6 level
Study Sprint Timer versus Yanlış Defteri: the parameters behind the verdict, then further details
ParameterStudy Sprint TimerYanlış Defteri
PriceFreeFree
Rating3.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 6 days — betterEvery 2 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS18.013.0 — better
Further details — not scored
Size140 MB25 MB
Age rating4+4+
DeveloperHarun DOGDUMustafa Demirer

In-app purchases

3 purchases

Study Sprint Timer

Subscriptions2
  • Monthly Premium$3.991 Month
  • Yearly Premium$29.991 Year
One-time1
  • Campus Style$1.99
3 purchases

Yanlış Defteri

Subscriptions2
  • Pro Monthly$1.991 Month
  • Pro Yearly7 Days trial$6.991 Year
One-time1
  • Pro Lifetime$19.99

Questions

Is Study Sprint Timer free?
Study Sprint Timer is free to download, with in-app purchases available.
Is Yanlış Defteri free?
Yanlış Defteri is free to download, with in-app purchases available.
Do Study Sprint Timer or Yanlış Defteri have ads?
Study Sprint Timer shows ads; Yanlış Defteri does not.
Which is updated more often, Study Sprint Timer or Yanlış Defteri?
Study Sprint Timer ships an update every 6 days, and Yanlış Defteri every 2 weeks. Most recently, Study Sprint Timer was updated on November 5, 2026 and Yanlış Defteri on October 31, 2026.

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