Comparison

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.

Head to head
About

学習時間積算計

Features
Read full description

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。

About

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.

Highlights
  • 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
Features
Read full description

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

学習時間積算計3 screens
Retime4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
学習時間積算計 versus Retime: the parameters behind the verdict, then further details
Parameter学習時間積算計Retime
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Positive reviews—72.2% of reviews
Number of ratings11
Update frequencyEvery 51 monthsEvery 5 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better17.0
Further details — not scored
Size108 MB30 MB
Age rating4+4+
Developermasaki murayamaRyo Iida

Customer experience

学習時間積算計

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Retime

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews18 reviews
Positive72.2%
Neutral5.6%
Negative22.2%

In-app purchases

None

学習時間積算計

No in-app purchases

3 purchases

Retime

Subscriptions3
  • 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

Questions

Is 学習時間積算計 free?
学習時間積算計 is free to download, with no in-app purchases.
Is Retime free?
Retime is free to download, with in-app purchases available.
Which has better reviews, 学習時間積算計 or Retime?
学習時間積算計 and Retime are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do 学習時間積算計 or Retime have ads?
Retime shows ads; 学習時間積算計 does not.
Which is updated more often, 学習時間積算計 or Retime?
学習時間積算計 ships an update every 51 months, and Retime every 5 days. Most recently, 学習時間積算計 was updated on June 1, 2026 and Retime on September 23, 2026.

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