Comparison

蓄積読書 vs StackBooks

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

蓄積読書

This app helps adults build a reading habit by tracking progress, estimating completion times, and offering features to maintain reading streaks. It supports all book formats and allows for note-taking to capture insights.

Highlights
  • Real-time estimated reading completion time
  • Supports paper, e-books, and audiobooks
  • Streak maintenance with freeze items
  • Live Activity for lock screen progress
  • Note-taking for reading insights
  • Keyword search and barcode scanning for book registration
Features
Read full description

■ 終わりが見えるから、読み切れる 「読了までの推定時間」をリアルタイムで算出。「あと30分で読み終わる」という具体的なゴールに変え、モチベーションを維持します。 ■ 紙の本・電子書籍・オーディオブック すべてに対応 ページ数、進捗率(%)、再生時間など、本の形に合わせた記録が可能。キーワード検索やバーコードスキャンで、気になる本を秒速で登録できます。 ■ 連続記録を「守る」フリーズアイテム 「どうしても読めない日」があっても大丈夫。連続フリーズ機能を使えば、積み上げたストリーク(連続記録)を途絶えさせることなく、翌日から再開できます。 ■ ロック画面で進捗を確認(Live Activity) アプリを閉じても大丈夫。Live Activity対応の読書タイマーが、ロック画面から今の進捗を常に通知。読書への集中を妨げません。 ■ あなたの思考を逃さないメモ機能 読書セッションごとの気づきを、その場で「知の蓄積」として保存。読み返すたびに、自分の成長を実感できます。 【主な機能一覧】 ・読書の記録・分析  ・読書タイマーによる時間計測と記録の積み上げ  ・進捗管理(ページ / % / 再生時間)  ・過去のペースに基づく「読了までの推定時間」表示 ・本の管理  ・登録方法:キーワード検索 / バーコード / 手動入力  ・全フォーマット対応:紙の本 / 電子書籍 / オーディオブック ・習慣化・モチベーション  ・連続記録(ストリーク)と自己ベスト更新  ・連続記録を守る「連続フリーズアイテム」  ・読書を忘れないための通知リマインダー ・データの安心と使い勝手  ・iCloud同期:複数端末で最新のデータを共有  ・バックアップ機能:大切な読書の軌跡をしっかり保護  ・ダークモード対応:夜の静かな読書タイムにも最適 【こんな方におすすめ】 ・本を買っても、つい途中で挫折してしまう方 ・読書を「知識の資産」として形に残したい方 ・毎日少しずつでも、読書を習慣にしたい方 ・あとどのくらいで読み終わるかを知って、計画的に読みたい方 ▼ サービス情報 利用規約: https://responsible-people-ca1.notion.site/31a8a268873e803fafe8e46f67115136 プライバシーポリシー: https://responsible-people-ca1.notion.site/30e8a268873e8055b53fd79ca7cb3014

About

StackBooks

Easily log books by scanning their ISBN or searching by title. Visualize your reading progress as a growing stack and organize your library with custom statuses, ratings, and notes. Track your reading habits and statistics offline.

Highlights
  • ISBN barcode scanning for quick book entry
  • Visual representation of reading progress as a book stack
  • Organize books with Wishlist, TBR, Reading, Read, and Paused statuses
  • Add star ratings, finish dates, and personal notes to finished books
  • Track reading statistics by author or tag
  • Offline functionality with on-device data storage
  • Export and import data for device changes
Features
Read full description

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

蓄積読書4 screens
StackBooks4 screens

Verdict

The call

The clearest difference is in-app purchases: StackBooks at none against 蓄積読書's 7. StackBooks also leads on update cadence (daily vs weekly) and iOS requirement (16.4 vs 26.0). On price, review sentiment, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 蓄積読書 sells 7 in-app purchases, starting at $2.99 per month. StackBooks asks for nothing beyond the download.

UpkeepUpdate frequency

蓄積読書 ships an update weekly, StackBooks daily. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.

Scorecard4 real differences · 4 level
蓄積読書 versus StackBooks: the parameters behind the verdict, then further details
Parameter蓄積読書StackBooks
PriceFreeFree
Positive reviews100.0% of reviews100.0% of reviews
Update frequencyWeeklyDaily — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhoneiPhone, iPad — better
Requires iOS26.016.4 — better
Further details — not scored
Size20 MB129 MB
Age rating4+4+
DeveloperYuki YamagishiKenta Nobutani

Customer experience

蓄積読書

Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

StackBooks

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

7 purchases

蓄積読書

Subscriptions2
  • 蓄積読書Plus+ 月額プラン7 Days trial$2.991 Month
  • 蓄積読書Plus+ 年額プラン7 Days trial$22.991 Year
One-time5
  • 連続フリーズ$0.29
  • 連続フリーズ 2個$0.49
  • 連続フリーズ 4個$0.99
Show 2 more
  • 連続フリーズ 3個$0.99
  • 連続フリーズ 5個$1.99
None

StackBooks

No in-app purchases

Questions

Is 蓄積読書 free?
蓄積読書 is free to download, with in-app purchases available.
Is StackBooks free?
StackBooks is free to download, with no in-app purchases.
Do 蓄積読書 or StackBooks have ads?
Neither 蓄積読書 nor StackBooks shows ads.
Which is updated more often, 蓄積読書 or StackBooks?
蓄積読書 ships an update weekly, and StackBooks daily. Most recently, 蓄積読書 was updated on November 3, 2026 and StackBooks on November 6, 2026.

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