StudyCal vs Rotus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
StudyCal
This app helps students organize their study schedules, track progress, and stay motivated. It features exam countdowns, a focus timer, and achievement badges to encourage daily studying. Plans can be easily managed and visualized with color-coded subjects and detailed statistics.
- Exam countdowns
- Daily to-do lists
- Study time tracking
- Focus timer
- Progress statistics
- Achievement badges
- Calendar integration
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How many days until the exam? What should you study today? StudyCal is a study calendar that turns your plans into today's to-do list. Check a plan off and your study time adds up automatically. Exam countdowns, home screen widgets, a streak heatmap, a focus timer and more than 50 achievement badges are all included. No sign-in needed. With Pro+, you can reschedule missed plans in one tap, see your pace toward exam day, sync between iPhone and iPad, and share your progress with a parent. StudyCal brings your study plans, timetable, to-do list and study time tracking together in one simple app for middle school, high school and exam students. Plans you add appear on that day's to-do list, and a single tap marks them done. Subjects are color-coded, and your study time is shown in charts. ■ Made for - Students who want to keep studying every day - Anyone tired of using separate apps for a timetable and a to-do list - Students preparing for exams who want to see time spent on each subject - Anyone who wants to add weekly recurring classes in seconds ■ Main features - Today's to-do: today's study plans in one list, with your completion rate at a glance - Calendar: switch between month, week, day and list views in one tap. Color-coded subjects and recurring plans - Timetable: the week view works as a timetable (any number of periods) - Quick plans: pick a subject and a type, and the title fills in for you - Recurring plans: every week on one or more days, with an end date. Automatic numbering such as "Lesson 1, Lesson 2, Lesson 3..." - Check off: tap the circle to finish a plan; it goes straight into your totals - Stats: weekly, monthly and yearly study time in stacked bar charts, with a breakdown by subject - Materials and bookshelf: attach textbooks and workbooks to your plans and see the study time for each one (icon-only materials are unlimited; up to 5 with photos for free) - Plan types: homework, preview, review, past exams, drills, workbooks and more (add your own) - Export to your iPhone calendar or Google Calendar - Automatic backup: once a day, your plans, records, settings and photos are backed up, including to iCloud, so you can restore them on a new device (free; keeping several devices in sync is Pro+) - Sharing with a parent (Pro+): once the student approves, a parent can see study time, time per subject, streak days and completion rate on their own phone. Plan names and notes are never sent. Parents can send stamps and short messages - Exam countdown: add an exam date to see the days left on the home tab and on widgets - Widgets: check today's to-do list and the days until your exam from the home screen - Streaks and badges: see the days you studied on a heatmap and collect badges as you keep going - Focus timer: a Pomodoro-style timer that alternates focus and breaks - No sign-in needed ■ Easy to start StudyCal needs no account and no sign-in. Your study records stay on your iPhone or iPad and in your own iCloud. Study totals are sent only when you use sharing with a parent. ■ Optional upgrades - StudyCal Pro (one-time purchase): app colors, calendar background photos, unlimited material photos, widget colors and background images, rewards, focus timer styles and custom stamps - StudyCal Pro+ (auto-renewing monthly or yearly subscription): reschedule missed plans, iPhone and iPad sync, pace toward exam day, past weekly reports, monthly reports, exam reviews and sharing with a parent (a parent can see up to 6 children if the parent subscribes). Includes everything in Pro All the basic features, including plans, to-do lists and stats, work without upgrading. Pro+ renews automatically unless canceled at least 24 hours before the end of the current period. You can cancel anytime from your subscription settings. Terms of Use: https://kazutaka.biz/kiyaku/ Privacy Policy: https://kazutaka.biz/privacy/
Rotus
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参考書を解きっぱなしにしないためのアプリ。 問題集の例題ひとつひとつに「解けたか」を記録すると、忘れかけたころに復習日が回ってきます。いつ復習するかは FSRS という記憶の予測モデルが決めるので、自分で計画を立て直す必要はありません。 ■ 使い方 参考書を登録する 章・節・例題といった階層をそのまま登録できます。階層の名前も数も自由なので、手元の参考書の作りに合わせられます。番号の振り方(通し番号/章ごと/節ごと)も選べます。 解いたら4段階で押す 「当然」「完璧」「不安」「復習」のどれかを押すだけです。次にいつ復習するかは自動で決まります。 今日の分をやる ホームには、今日やる例題が1列に並びます。「ここまでが最低ライン」「ここまでが復習」「ここまでが理想」で区切ってあるので、時間がない日でもどこまでやれば足りるのかが分かります。 ■ できること ・例題ごとの記録と、4段階での評価 ・FSRS による復習日の自動計算(目標の定着率は参考書ごとに変えられます) ・定着率を0〜100%で表示。参考書ごと、単元ごとに見られます ・今日の分を「最低ライン」「復習」「理想」で区切って表示 ・章・節・例題などの階層を自由に決められる参考書の登録 ・テキスト(Markdown)やファイル(CSV・TSV・JSON)からの一括登録と書き出し ・分野を割り当てて、参考書をまたいで苦手を見る ・終了予想、復習の山、苦手な単元、評価の内訳、忘却率の推移、参考書ごとの比較などの分析 ・つまずいた理由と、1問にかけた時間の記録 ・カレンダーで、やった日とこれからの予定を見る ・毎日の通知 ・例題や参考書に写真を付ける ・印刷用のファイルを作る ・Apple Watch から、その場で評価とコメント ・端末をまたいだ同期(サインインは任意です) ■ 数字をやわらげません 遅れている復習は遅れているまま、実数で表示します。連続記録のような、続けること自体をあおる仕組みは入れていません。予測にも限界があるので、その当たり具合を自分で確かめられる画面を用意しています。 ■ 無料で使えること 記録、テキストでの登録、ホーム、カレンダー、進捗率は、無料のまま使えます。 ■ Pro について 分析のくわしい項目、ファイルからの一括登録、写真、毎日の通知、FSRS の個人最適化などが使えるようになります。 ・買い切り(一度の支払いで、ずっと使えます) ・月額(自動更新。最初の1か月は無料) ・週額(自動更新) どのプランでも使える機能は同じです。価格はアプリ内のプラン画面に表示されます。 月額・週額は自動更新のサブスクリプションです。購入を確定したときに Apple ID へ請求されます。無料お試しが付いている場合は、お試し期間が終わったときに請求が始まり、終わる24時間前までに解約すれば請求されません。現在の期間が終わる24時間前までに解約しない限り自動で更新され、同じ金額が請求されます。解約と更新の停止は、アプリの「購入を管理」または端末の設定から行えます。 利用規約: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ プライバシーポリシー: https://manage-app-api.foraistudio1126.workers.dev/privacy
Screenshots
Verdict
StudyCal and Rotus are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. StudyCal sells 3 in-app purchases, starting at $0.99 per month and Rotus sells 3 in-app purchases, starting at $0.49 per 7 days. Whichever you choose, the download price is not the number that matters.
| Parameter | StudyCal | Rotus |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Every 2 days | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 15.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 73 MB | 61 MB |
| Age rating | 4+ | 4+ |
| Developer | Kazuaki Takahashi | Anraku Tomomi |
In-app purchases
StudyCal
- Pro+ 月額プラン$0.991 Month
- Pro+ 年額プラン$9.991 Year
- 勉強カレンダー Pro$1.99
Rotus
- Rotus pro (weekly)$0.497 Days
- Rotus pro (monthly)1 Month trial$1.991 Month
- Rotus pro$7.99









