読書カレンダー vs ReadMaster
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
読書カレンダー
Visually track your reading habits with a calendar-style log. Easily register books by scanning barcodes or searching by title. Organize your read books on a digital bookshelf and analyze your progress with premium features.
- Calendar-style reading log
- Book cover display on calendar
- Barcode book registration
- Searchable digital bookshelf
- Reading status categorization
- Reading progress visualization (premium)
Read full descriptionHide full description
◇Beautifully Record and Manage Your Daily Reading on a Calendar◇ BookCal (Bukukare) is a simple, intuitive reading log app designed for book lovers. View your reading history at a glance in a calendar format and build a consistent reading habit. 【Key Features】 Calendar-style Reading Log ・Visually record your daily reading on a calendar ・Book cover images appear on the calendar, making your reading history instantly visible ・Quickly look back at past reading records Easy Book Registration ・Instantly register books by scanning barcodes ・Search for and add books by title Digital Bookshelf ・Manage the books you've read on a beautifully organized bookshelf ・Find specific books quickly using search, filter, and sort functions ・Categorize books by reading status (Reading, Finished, Unread) Visualize Reading Progress (Premium Feature) ・Analyze reading patterns with monthly and yearly graphs ・Set reading goals and track your progress ・View detailed statistics (total books read, consecutive reading streaks, etc.) Start your reading journey with BookCal—designed to provide a richer reading experience for everyone who loves books! 【BookCal Terms of Service】 https://tsutsunoidoblog.com/book_diary_terms_of_service/ 【BookCal Privacy Policy】 https://tsutsunoidoblog.com/bookdiary_privacy_policy/
ReadMaster
Read full descriptionHide full description
■ 読書習慣 & 書籍 の管理に ReadMaster ■ For building better reading habits and managing your books — ReadMaster. 休日の朝、通勤のスキマ、就寝前のひととき___ いつでもワンタップで読書の世界へ。 毎日の読書習慣を支える、読書記録&タイマーアプリ。 Start reading anytime — in the morning, during your commute, or before bed. ReadMaster helps you build a daily reading habit with a simple reading timer and book tracker. ◯ 思い立ったらすぐに起動、読書タイマー Start reading instantly with one tap. アプリを開いてワンタップ、気が向いた瞬間にすぐ読書を始められます。 もちろん、集中力を妨げる広告などは一切ナシ。 Open the app and start your reading session with a single tap — no ads, no distractions, just reading. ◯ 自分だけの本棚で書籍を管理 Organize your personal bookshelf. 気になる本は、すぐ「本棚」へ登録! 登録した本は自由自在に管理され、コメントや評価、読了日をいつでも振り返ることができます。 Add your favorite books to your personal shelf. Track your progress, add notes and ratings, and revisit your reading history anytime. ◯ 読書時間を自動で集計 Automatically track your reading time. あなたの読書習慣をデータとして可視化。 面倒な手入力は一切不要!タイマーをスタートするだけで、読書時間が自動で記録されます。 Your reading habits are visualized through clean, automatic tracking. No manual input needed — just start the timer and your sessions are recorded automatically. ◯ 美しいデザインと癒しの音楽 Beautiful design and relaxing music. 洗練されたUIとヒーリングBGMが、あなたに最高の読書時間を提供します。 もちろん、完全な静寂での読書を楽しみたい人もサポートします。 Enjoy a calm, focused reading experience with elegant design and soothing background music. Or simply read in silence — the choice is yours. ■ 毎日の読書は、日常に小さな彩りを与えます そしてこのアプリは、未知なる本の世界へ旅立つあなたのよきパートナーとなるでしょう ■ Reading adds color to your everyday life. Let ReadMaster be your companion on your journey into the world of books. 利用規約 (Terms of Use) https://temma040302.github.io/privacy-policy/terms_of_use.html プライバシーポリシー (Privacy Policy) https://temma040302.github.io/privacy-policy/privacy_policy.html サポートページ (Support Page) https://temma040302.github.io/privacy-policy/support.html
Screenshots
Verdict
The clearest difference is update cadence: 読書カレンダー at every 10 days against ReadMaster's every 2 months. On price, ads, 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. 読書カレンダー sells 4 in-app purchases, starting at $1.99 per month and ReadMaster sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
読書カレンダー ships an update every 10 days, ReadMaster every 2 months. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.
| Parameter | 読書カレンダー | ReadMaster |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 66.7% of reviews | — |
| Update frequency | Every 10 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 — better | 18.5 |
| Further details — not scored | ||
| Size | 54 MB | 95 MB |
| Age rating | 4+ | 4+ |
| Developer | Manabu TsuTsui | TEMMA SUZUKI |
In-app purchases
読書カレンダー
- 月額サブスクリプション7 Days trial$1.991 Month
- 年割サブスクリプション7 Days trial$22.991 Year
- 買い切りプラン(24時間限定)$14.99
- 買い切りプラン$29.99
ReadMaster
- ReadMaster Plus 1ヶ月$0.991 Month
- ReadMaster Plus 6ヶ月$5.996 Months









