ぐるどく vs StackBooks
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。
StackBooks
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A reading tracker that makes adding books easy — and stacks up every book you finish. ADDING A BOOK IS ONE SCAN Point the camera at the barcode (ISBN) on the back of a book and the title, author, cover and page count are filled in. Scans run back to back, so a whole shelf takes a couple of minutes. You can also search by title or author and add a book from the results. WHAT YOU READ BECOMES HEIGHT The page count of each book turns into thickness, and your finished books pile up. Look back on how tall your stack has grown. A mug, an ostrich, a utility pole — your stack is drawn next to things you know, so you can see how far it has come. You can also turn the stack into an image and share it. YOUR TBR PILE AND YOUR READS, SORTED Five statuses keep your books sorted: Wishlist, TBR, Reading, Read and Paused. Books you're curious about go to Wishlist; books you own but haven't read yet go to TBR. Move them to Reading when you start, Read when you finish, or Paused if you set them aside. You can also see how tall your TBR pile alone has grown. Finished books can hold a star rating, the date you finished, and a note about what you thought. Add tags and you can filter later by "fiction", "work", or anything else you use. RE-READS COUNT TOO When you read a book again, each read gets its own finish date and notes. EVERYTHING STAYS ON YOUR DEVICE Titles, notes, ratings and the cover photos you take are kept on your device, not on a server. There is no account and nothing to log in to. When you change phones, export a backup and import it on the new one. LOOK BACK ON YOUR READING Built-in reading stats. Books read, pages read and the height of your stack, whenever you want to see them. See how much you read by author or by tag. WHO IT IS FOR - Readers whose TBR pile got out of hand - Anyone who wants to count books and pages, not just titles - Readers who want to keep notes instead of a separate reading journal - Fiction, non-fiction and comics, tracked in one place - Anyone looking for a book tracker that works without an account FREE, WITH NO BANNER OR FULL-SCREEN ADS Every feature is free. No banner or full-screen ads, and no in-app purchases. ALSO - English and Japanese, following your device language - Stack height in cm/m or inches/feet, whichever you prefer - Works offline; only book search needs a connection
Screenshots
Verdict
The clearest difference is in-app purchases: StackBooks at none against ぐるどく's 1. StackBooks also leads on update cadence (every 2 days vs every 2 weeks). ぐるどく's advantage is iOS requirement (14.0 vs 16.4). On price, ads 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. ぐるどく sells 1 one-off in-app purchase. StackBooks asks for nothing beyond the download.
ぐるどく ships an update every 2 weeks, StackBooks every 2 days. The most recent releases landed on October 9, 2026 and October 8, 2026 respectively.
| Parameter | ぐるどく | StackBooks |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 66 MB | 119 MB |
| Age rating | 4+ | 4+ |
| Developer | MAKASETE, Inc | Kenta Nobutani |
In-app purchases
ぐるどく
- コメントの閲覧・投稿機能の利用$5.99
StackBooks
No in-app purchases









