ぐるどく vs UniBook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ぐるどく
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ぐるどくアプリは、グループで EPUB ファイルを読む際に便利なリーダーアプリです。気になる文章を長押しして選択し、リーダー下部のコメントボタンを押せば選択した文章に対してコメントすることが出来ます。これにより「自分とは立場の異なる人はどういう感想を抱くのか?」「読んでいてわからなかった部分の議論になる」などを始めとしたことが起こり、書籍に対する理解や見識を深めることができます。 活用方法はさまざまです。ソフトウェアエンジニアがよくおこなっている輪読会に利用することができます。チームビルディングの際の共通認識を作るために書籍を読み合わせるときにも活用できるでしょう。夫婦で子育てに関する書籍をぐるどくで読み、コメントしてそれぞれの考え方を理解する手助けになることもあるでしょう。ぜひご利用いただいて、皆様のご活用方法をお教えいただけると嬉しいです。
UniBook
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Tired of subscriptions? UniBook is a one-time-purchase reader for the EPUB, PDF, M4B, and MP3 files you own. Read and listen offline, keep your library organized, and pick up exactly where you left off. — WHY READERS CHOOSE UNIBOOK — PAY ONCE, READ FOR LIFE A single in-app purchase unlocks the full reader. No monthly plan and no automatic renewal. YOUR LIBRARY STAYS YOURS Import compatible DRM-free files through Files, iCloud Drive, or the Share extension. Your imported books remain on your device, UniBook does not upload your library, and no account is required. — FEATURES — EPUB READER • Adjustable text size and reading themes • Light, sepia, and dark reading themes • Save highlights and quotes • Share quotes as polished images • Resume from your saved position • See reading progress in the reader and your library PDF READER • Native PDF viewing • Page and progress tracking • Saved position for reliable resume • Progress visible alongside your other books AUDIOBOOK PLAYER • M4B and MP3 audiobooks • Single-file and multi-file books • Playback speed from 0.5x to 2x • Sleep timer • Background playback and lock-screen controls • Resume from your last position • Chapter navigation LIBRARY MANAGEMENT • Custom shelves and favorites • Dedicated Reading and Finished shelves • Active books stay easy to reach; completed books move to the end • Import several compatible files from Files • Add books and audiobooks from other apps with the Share extension • Share or remove your own files at any time READING STATISTICS • Daily reading and listening time • Reading streaks and daily goals • Yearly activity graph • Year in Review SIRI • Resume your last audiobook with the “Play Last Audiobook” shortcut Supported formats: EPUB, PDF, M4B, MP3 UniBook is built for readers who manage their own digital library and want a focused, private reading experience without a recurring subscription. Note: UniBook is a reader app. It does not sell, distribute, or provide book content. You are responsible for ensuring that you have the right to use every file you import. DRM-protected files are not supported.
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Verdict
The clearest difference is iOS requirement: ぐるどく at 14.0 against UniBook's 26.0. On price, update cadence, ads and in-app purchases 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. ぐるどく sells 1 one-off in-app purchase and UniBook sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
ぐるどく ships an update every 2 weeks, UniBook every 3 weeks. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.
| Parameter | ぐるどく | UniBook |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 66 MB | 15 MB |
| Age rating | 4+ | +4 |
| Developer | MAKASETE, Inc | Denis Tronin |
In-app purchases
ぐるどく
- コメントの閲覧・投稿機能の利用$5.99
UniBook
- UniBook Premium$49.99









