Comparison

Study Timer vs Sum

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

Head to head
About

Study Timer

This app helps students and professionals plan study time for exams. It calculates daily targets based on your exam date and total hours, then tracks focused sessions. Visualize progress with charts and maintain consistency with streaks and badges.

Highlights
  • Study timer with stopwatch, countdown, or Pomodoro
  • Progress tracking by day, week, month, and year
  • Exam countdown and multiple goal management
  • Organize subjects, books, and courses
  • Set total time goals and track study streaks
  • Offline core tracking with iCloud sync
Features
Read full description

How much should you study today? Set your exam date and target hours. Gokaku Log calculates a daily time target and records each session, so you can see your progress. ■ Recommended for Busy students and working adults preparing for NCLEX, CPA, GRE, PMP, IELTS and university exams, who want to plan their time, track focused sessions and build a steady routine. ■ Main features [1] Study timer Record sessions with a stopwatch, countdown or Pomodoro timer: 25 minutes of focus and a 5-minute break. Timing continues in the background. [2] Study charts Review your hours by day, week, month and year. Compare subjects and see your activity on a calendar and heatmap. [3] Exam countdown Add your exam dates, see the days remaining and manage multiple goals. Your target hours and exam date determine your daily study target. [4] Subjects and materials Organize your own subjects, books and courses, then track the time spent on each. [5] Goals and consistency Set a total time goal, review your daily target and see your study streak and achievement badges. [6] Save and review Review weekly and monthly reports. Back up your study records and sync with iCloud when changing devices. ■ Five reasons to choose Gokaku Log 1. One place for exam dates, time goals and completed sessions. 2. Simple recording without creating an account. 3. Focused sessions at your own pace, with dark mode. 4. Daily targets calculated from the hours you enter, rather than a guessed passing requirement. 5. Core tracking works offline; iCloud sync requires a connection. Study records can be saved on your device and in iCloud. ■ Exam examples NCLEX, CPA, GRE, PMP, IELTS and university exams. You register your own dates, subjects and materials. This is a planning and time-tracking tool; it does not provide questions, lessons or official exam dates. ■ Pricing Core features are free. Optional Premium removes ads, allows unlimited materials and enables study-data export. ■ Support Send feedback and requests through Contact inside the app. Make your daily effort visible. Start tracking with Gokaku Log today. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Sum

Track and manage your study time by subject with a simple timer. Log sessions, add notes, and visualize your progress with weekly graphs and a calendar. Focus on learning without distractions.

Highlights
  • Study time tracking
  • Subject and material logging
  • Weekly progress graphs
  • Calendar visualization
  • Study streaks
  • Pomodoro timer
Features
Read full description

This is a simple study timer app that allows you to record and manage your study time by subject. Simply measure your time with the timer and save it. You can also log sessions manually or add entries for past dates. You can record everything together, including subjects, study materials, pages, and notes. You can view the big picture of your studies by checking your subject balance with weekly graphs and reviewing your progress streaks on the calendar. No ads, no social media features, and no account registration required. All data is saved on your device, so there are no privacy concerns. Perfect for anyone who wants to focus on learning, from exam preparation to certifications and language studies. [Main Features] - 3 timer modes (Stopwatch, Countdown, Pomodoro) - Management of subjects, materials, pages, and notes - Weekly graphs to check subject balance (bar chart & donut chart) - Calendar to visualize study days with color-coding - Display of consecutive study days (streaks) - Daily study reminder - Backup and data export functions [Stackd Pro (One-time purchase)] - Monthly graphs and cumulative line graphs - Setting weekly goals and checking achievement rates - 9 color themes - Home screen and lock screen widgets - Real-time timer display on the Lock Screen

Screenshots

Study Timer4 screens
Sum4 screens

Verdict

The call

The clearest difference is ads: Sum at none against Study Timer's shown. Sum also leads on update cadence (every 3 weeks vs every 6 weeks). On price, review sentiment, in-app purchases and monetization model 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 Timer sells 1 in-app purchase, starting at $9.99 per year and Sum sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Study Timer ships an update every 6 weeks, Sum every 3 weeks. The most recent releases landed on November 11, 2026 and November 9, 2026 respectively.

Scorecard2 real differences · 8 level
Study Timer versus Sum: the parameters behind the verdict, then further details
ParameterStudy TimerSum
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 6 weeksEvery 3 weeks — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad — betteriPhone
Requires iOS17.0 — better18
Further details — not scored
Size9 MB3 MB
Age rating4+4+
Developerkizuna yoshiharaNene Nakagawa

Customer experience

Study Timer

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Sum

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Study Timer

Subscriptions1
  • 広告削除(年払い)$9.991 Year
1 purchases

Sum

One-time1
  • Stackd Pro$1.99

Questions

Is Study Timer free?
Study Timer is free to download, with in-app purchases available.
Is Sum free?
Sum is free to download, with in-app purchases available.
Do Study Timer or Sum have ads?
Study Timer shows ads; Sum does not.
Which is updated more often, Study Timer or Sum?
Study Timer ships an update every 6 weeks, and Sum every 3 weeks. Most recently, Study Timer was updated on November 11, 2026 and Sum on November 9, 2026.

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