学習時間積算計 vs Retime
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
学習時間積算計
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文法、演習、単語、シャドウイング等々の各項目を何分勉強したかを「積算」するアプリです。 積算タイマーには、リアルタイムの日時(年・月・日・曜日)と時間(時・分・秒)が表示されます。 ・経過(積算)時間は「START」ボタンを押すと開始され、押すごとに「START」と「PAUSE」が表示され「PAUSE」表示されているときは経過(積算)時間は停止しています。経過(積算)時間をリセットするには「CLR」ボタンを押します。 ・勉強(練習)の項目は4つあり、各項目名は自分で入力します。変更・編集が可能です。 ・各項目には「積算時間」の表示と積算時間の追加、置換、CLRの3つのボタンがあります。「追加」ボタンは表示されている積算時間にタイマーの時間がプラスされ「置換」ボタンは表示されている積算時間をタイマーの時間に入れ替え「CLR」ボタンは積算時間をリセットします。 ・下段の「記録」ボタンを押すと」記録ページに移動します。 ・記録ページには記録場所が5つあり、各番号の「#」ボタンを押すと「積算タイマー」ページの項目4つの表示が「日時時間、各項目の積算時間、各項目名」が表示されます。・下段にある「データ保存」ボタンを押すと、アプリを停止した後も「データ読出」ボタンで再表示することができます。
Retime
This app helps serious learners manage their study time and track progress. It combines a timer, task management, and analytics to visualize daily efforts and ensure goals are met. Features include goal setting, exam countdowns, and app blocking to enhance focus.
- Unified task management and timer
- Study goal progress tracking
- Exam countdown and score tracking
- Distracting app blocking
- Pomodoro and count-up timer modes
- Study time visualization
- Customizable subjects and themes
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You're studying hard, but can't see any progress. You make a plan, but somehow it always falls apart. That feeling of "working hard but getting nowhere" — Retime changes that. Retime is a study management app for serious learners, bringing together a timer, task management, and learning analytics in one place. "Plan → Focus → Record → Analyze" Complete this entire cycle in a single app. Your daily efforts become visible through graphs and numbers. Students preparing for exams, professionals studying for certifications, language learners, building a reading habit—— Retime is here for anyone who is serious about reaching their goals. Feature ① Task Management and Timer, Unified ・Manage daily tasks with a weekly calendar. Swipe smoothly between weeks ・Link tasks to your timer to accurately record what you studied and for how long ・Set up recurring tasks to automatically create your daily study routine ・Drag and drop to reschedule tasks with ease ・One glance at your to-do list tells you exactly what to study today Feature ② Track Whether You're On Pace with Study Goals ・Set concrete goals like "finish 300 pages of this textbook by [date]" ・Automatically compare your recommended daily pace against your actual progress ・A predicted completion date is always shown, so you know at a glance whether you'll make it in time ・Manage multiple goals simultaneously — exam prep, certifications, reading, and more Feature ③ Exam Countdown & Mock Exam Score Tracking ・Register your exam dates and see remaining days updated in real time ・Log your mock exam and practice test scores by subject ・Visualize your score trends with charts to see how much you've improved Feature ④ Block Distracting Apps During Study Sessions ・Block apps like social media, YouTube, and games while you study ・Effective for breaking phone addiction ・Blocking is active only while the timer is running, so the quality of your study time goes up Feature ⑤ Two Timer Modes: Pomodoro & Count-Up ・Use the Pomodoro timer to alternate between focused work and breaks, maximizing productivity ・Use the count-up timer to freely measure and log your study time ・Supports Dynamic Island and Lock Screen Live Activity — always keep an eye on your timer ・Check today's study time at a glance with the home screen widget ・Stay focused with background sounds like alpha waves, brown noise, rain, and ocean waves Feature ⑥ Visualize Study Time to Stay Motivated ・View weekly and monthly study time trends in graph form ・See a subject-by-subject breakdown to understand where your time is going ・Browse your full session history in a timeline view ・Watching your efforts pile up keeps the motivation going Feature ⑦ Customize to Make It Yours ・Set your own subject names and colors ・Change the app's theme color to match your style Suitable for every learning scenario — students, professionals studying for certifications, language learners, and anyone building a reading habit. Start recording a little every day, and keep moving toward your goal.
Screenshots
Verdict
The clearest difference is in-app purchases: 学習時間積算計 at none against Retime's 3. 学習時間積算計 also leads on ads (none vs shown) and iOS requirement (12.0 vs 17.0). Retime's advantage is update cadence (every 5 days vs every 51 months). On price, rating, ratings volume 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. Retime sells 3 in-app purchases, starting at $1.99 per month. 学習時間積算計 asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for 学習時間積算計 against 5.0 for Retime. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
学習時間積算計 ships an update every 51 months, Retime every 5 days. The most recent releases landed on June 1, 2026 and September 23, 2026 respectively.
| Parameter | 学習時間積算計 | Retime |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Positive reviews | — | 72.2% of reviews |
| Number of ratings | 1 | 1 |
| Update frequency | Every 51 months | Every 5 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 108 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | masaki murayama | Ryo Iida |
Customer experience
学習時間積算計
Retime
In-app purchases
学習時間積算計
No in-app purchases
Retime
- リタイム PRO 1ヶ月$1.991 Month
- リタイム PRO 1年間 キャンペーン1 Year trial$19.991 Year
- リタイム PRO 1年間$19.991 Year









