Gokaku Log vs Stackd
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Gokaku Log
This app helps you track study time for certification exams. It features a Pomodoro-ready timer, automatic progress visualization, and exam countdowns. Designed for busy individuals, it supports various exams and helps you stay motivated towards your goals.
- Study timer with Pomodoro support
- Automatic study time visualization
- Exam date countdown
- Subject and material registration
- Goal management and progress tracking
- Offline functionality
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"Gokaku Log" is a study-record app that supports your daily exam study all the way to passing. A simple, easy-to-keep-up study timer & record tool for busy working adults and students. ■ Recommended for - Aiming for certification exams such as bookkeeping, Real Estate Transaction Specialist (Takken), Administrative Scrivener, Labor & Social Security Attorney (Sharoshi), FP, or TOEIC - Wanting to visualize study time and stay motivated - Wanting to make good use of spare moments — commuting, lunch breaks, before bed - Wanting to solve "I can't focus" and "I can't keep it up" - Wanting to reverse-calculate the days and study hours left until the exam - Wanting to review progress in graphs and see the road to passing ■ Main features [1] Study timer (Pomodoro-ready) - Auto-record study time with one tap - Both stopwatch and countdown modes - Pomodoro Technique: 25 min focus + 5 min break - Keeps recording in the background while the timer runs [2] Automatic study graphs - Visualize study time by day / week / month / year - Stacked graphs by subject (material) - Spot study imbalances at a glance - Calendar view shows your streak [3] Exam-date countdown - Register the dates of exams you plan to take - Check "X days left" on your home screen daily - Manage multiple exams at once (parallel exams supported) - Auto-calculate required daily study hours by reverse calculation from your target [4] Subject & material registration - Freely register materials for each exam - Tag by subject (Civil Law / Accounting / Grammar, etc.) - Total accumulated time per material - Set icons for your reference books [5] Goal management toward passing - Set your exam date and total target hours - Shows your recommended daily study time - Achievement badges reward you for keeping going - Shows your consecutive study days (streak) [6] Saving & reviewing your data - Auto-generate weekly / monthly reports - Feel your growth: "studied X more hours than last month" - Back up & restore your data - iCloud sync for peace of mind when changing devices ■ 5 reasons people choose Gokaku Log 1. Designed specifically for certification exams Built not for university entrance, but for working adults aiming for national exams. Supports every qualification — bookkeeping, Takken, Sharoshi, nursing and civil-service exams, FP, TOEIC, IT, and more. 2. Simple and easy to keep up Just two taps from launch to recording. No complex setup — start today. 3. Designed not to break your focus Notifications off while studying, minimal ads, dark-mode support. Focus first. 4. Exam-date reverse-calculation algorithm Enter the total hours you need to pass, and it auto-calculates the daily hours required. Aim for passing with a plan. 5. Works fully offline Use it on the train or in a café, with no connection. Privacy-safe — data stays on your device. ■ Examples of supported qualifications & exams - Bookkeeping (Nisshō levels 1–3) - Real Estate Transaction Specialist (Takken) - Administrative Scrivener - Labor & Social Security Attorney (Sharoshi) - Financial Planner (FP / AFP / CFP) - TOEIC / TOEFL / Eiken - IT Passport / Fundamental & Applied IT Engineer - National nursing & pharmacist exams - Civil-service exams (national / local / police / fire) - Teacher recruitment, SME Management Consultant, Registered Sales Clerk - Medical & dispensing office work, various certification tests * Plus every other qualification, certification, and national exam ■ About pricing - All core features are free - Premium (optional) removes ads, allows unlimited material registration, and enables data export ■ Support For feedback and requests, please reach us via "Contact" inside the app. We'll keep improving Gokaku Log into an app that supports your success, reflecting your input. With Gokaku Log, turn your daily efforts into "passing." Why not start visualizing your study today? Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Stackd
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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
Screenshots
Verdict
The clearest difference is ads: Stackd at none against Gokaku Log's shown. On price, update cadence, 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
Both are free to download. Gokaku Log sells 1 in-app purchase, starting at $9.99 per year and Stackd sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Gokaku Log ships an update every 3 weeks, Stackd fortnightly. The most recent releases landed on September 24, 2026 and September 14, 2026 respectively.
| Parameter | Gokaku Log | Stackd |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Every 3 weeks | Fortnightly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 — better | 18 |
| Further details — not scored | ||
| Size | 8 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | kizuna yoshihara | Nene Nakagawa |
In-app purchases
Gokaku Log
- 広告削除(年払い)$9.991 Year
Stackd
- Stackd Pro$1.99









