Comparison

読マ(Dokuma) vs Book Memo

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

Head to head
About

読マ(Dokuma)

Features
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読書中に出会った「分からない言葉」を、本ごとに管理し、辞書を引くことができる単語帳アプリ。 AIによる単語分析機能を搭載。 読んだ本に単語を紐づけて記録。あとから本棚を眺めるように振り返れば、「あの物語で覚えた言葉」として記憶に深く定着します。革装の本と羊皮紙のような、温かみのあるデザインで読書時間に寄り添います。 ■ ISBNバーコードを読むだけで本棚に 本の裏のバーコードをスキャンするだけで、タイトル・著者・表紙を自動取得。手入力でも登録できます。 ■ AIが言葉の解説を生成 AIが、単語の意味・語源・例文を解説。 ■ 写真から単語をまとめて登録(画像AI) 気になる一節を撮影するだけで、AIが難しい単語を抽出して候補に。チェックを入れて一括登録できます。 ■ 内蔵辞書もずっと無料 Wiktionary・iOS内蔵辞書での検索は回数無制限。端末内でサクサク調べられます。 ■ 忘れた頃に、ちょうど復習 忘却曲線が「そろそろ忘れる頃」を見計らって復習を提案。紙をめくるようなカードで、覚えた/忘れたを記録します。 ■ 栞で大切な言葉に印を 重要度を3段階でマーキング。お気に入りの言葉や、重要な言葉をマークします。 ■ 読書に集中する「集中セッション」 読書タイマーで集中時間を計測。離れると優しく呼び戻し、終われば「本棚に綴じました」と記録します。連続記録(ストリーク)で習慣も後押し。 ■ あなたのデータは、あなたの手元に 書籍・単語データはすべて端末内(オフライン動作)。バックアップはあなた自身のGoogle Driveのみ。広告は一切表示しません。 そのほか、単語の読み上げ、5種類のテーマカラー、文字サイズ調整など、読書体験を心地よくする工夫を詰め込みました。 無料でも、本棚・内蔵辞書・復習・集中セッションのすべてをお使いいただけます。AI単語解説や画像AI解説も一部無料でお試しいただけます。 もっと使い込みたい方へ、Premiumなら ■ AI単語解説・画像AI解説をたっぷり利用 ■ 書籍・単語の登録上限を解除 ■ CSVエクスポート ほか

About

Book Memo

Features
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"How many books did I finish this year?" — the answer lives on your shelves. Book Memo is a simple reading log: organize the books you're reading, have finished, or want to read; track page progress and reading time; and keep the passages that stayed with you. ■ Three shelves ・Sort books into Reading, Finished, and Want to Read ・Enter title and author, then design your own cover with a color and emoji ・No book-database connection by design — everything is recorded by you ■ Progress and time ・Log "up to page 120" or "read 30 minutes" in seconds ・A progress bar shows where you are in every book ・Finished books move to your Finished shelf with the date ■ Notes and quotes ・Save memorable passages with page numbers ・Keep thoughts per book and look back over them in order ■ Stats that keep you going ・Reading streak (consecutive days) ・Books finished this year vs. your annual goal ・Reading time and total pages this month and year ■ Widgets ・Your current book with progress and your streak, right on the Home Screen ・Optional daily reading reminder at a time you choose ■ Private by design ・All data stays on your device — nothing is sent to a server ・No account, no sign-in, no internet needed ・Available in Japanese, English and Simplified Chinese Start your record with one page today.

Screenshots

読マ(Dokuma)4 screens
Book Memo3 screens

Verdict

The call

The clearest difference is ads: 読マ(Dokuma) at none against Book Memo's shown. 読マ(Dokuma) also leads on update cadence (daily vs every 2 days) and device support (3 vs 1). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 読マ(Dokuma) sells 2 in-app purchases, starting at $2.99 per month and Book Memo sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

読マ(Dokuma) ships an update daily, Book Memo every 2 days. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

Scorecard4 real differences · 2 level
読マ(Dokuma) versus Book Memo: the parameters behind the verdict, then further details
Parameter読マ(Dokuma)Book Memo
PriceFreeFree
Update frequencyDaily — betterEvery 2 days
AdsNo — betterYes
In-app purchasesYesYes
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better17.0
Further details — not scored
Size58 MB5 MB
Age rating4+4+
DeveloperSho Yamamoto丽佳 施

In-app purchases

2 purchases

読マ(Dokuma)

Subscriptions2
  • Dokuma Premium(月額)$2.991 Month
  • Dokuma Premium(年額)$29.991 Year
1 purchases

Book Memo

One-time1
  • Remove Ads$0.99

Questions

Is 読マ(Dokuma) free?
読マ(Dokuma) is free to download, with in-app purchases available.
Is Book Memo free?
Book Memo is free to download, with in-app purchases available.
Do 読マ(Dokuma) or Book Memo have ads?
Book Memo shows ads; 読マ(Dokuma) does not.
Which is updated more often, 読マ(Dokuma) or Book Memo?
読マ(Dokuma) ships an update daily, and Book Memo every 2 days. Most recently, 読マ(Dokuma) was updated on October 24, 2026 and Book Memo on October 21, 2026.

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