Comparison

読書メモ vs Yondazo

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

Head to head
About

読書メモ

Features
Read full description

・シンプルな読書管理アプリです。 ■読みたい本を覚書して、 ■読み終わったら評価を添えて保存します。 ・タイトル、著者などでWeb検索して、 ・その情報(表紙画像etc.)を保存可能。 ・評価印やメモも記録できます。 ・ジャンル管理、著者/年月 別 の一覧表示 ・楽天Books商品情報にリンク。 ※無料版は、データ追加20回までの制限有り。 【アドオン課金による機能拡張】 ・データ追加の回数制限が解除されます。 [対応OS] iOS 12.0 以上 ◇Twitterサポート @enaksoft

About

Yondazo

Track your reading progress with detailed charts and insights. Log books, add notes, and visualize your reading journey over time. Offers on-device AI analysis for private habit discovery.

Highlights
  • Monthly, yearly, and all-time reading charts
  • On-device AI reading habit analysis
  • Book notes, ratings, and genre tagging
  • Visual bookshelf with cover grid or list view
  • Barcode scanning for quick book entry
  • Data backup and transfer
Features
Read full description

Yondazo is a reading log app that helps you track every book you finish and reflect on your reading journey from three different angles: monthly totals, year-over-year comparisons, and all-time growth. On Apple Intelligence-compatible devices, you can also get on-device AI insights into your reading habits — fully private, fully local. ■ THREE CHARTS TO VISUALIZE YOUR READING See how much you've read this month with the monthly bar chart, compare this year against last year with the year-over-year view, and watch your reading habit build over time with the cumulative line chart. Switch between the three views to look back on your reading journey from every angle. ■ AI READING INSIGHTS, PROCESSED ON-DEVICE On Apple Intelligence-compatible devices, on-device AI analyzes your reading habits and surfaces patterns you might not have noticed on your own — favorite genres, go-to authors, and your natural reading rhythm. Everything runs locally on your iPhone. Your reading data never leaves the device and is never sent to any server. It's private AI reading analysis — with nothing ever sent to the cloud. * On devices that don't support Apple Intelligence, you can still explore your reading trends through detailed statistics. ■ NOTES, RATINGS & GENRES FOR EVERY BOOK Jot down your thoughts after finishing a book, give it a 5-star rating, and tag it with a genre. Each entry becomes part of your personal reading journal, so you can revisit what you read and how you felt about it. Bookmark your favorites to find them again with a single tap. ■ A BEAUTIFUL BOOKSHELF, ALL YOURS Every book you add appears in a beautiful cover grid — a bookshelf that's entirely yours, ready to browse anytime. Prefer a cleaner view? Switch to list mode with a single tap. ■ ADD BOOKS IN SECONDS WITH BARCODE SCAN Just point your camera at a book's barcode. The title, author, publisher, and cover are added automatically — no tedious typing required. For older titles without a barcode, you can search and add them by title. ■ YOUR DATA, SAFE AND PORTABLE Your reading history matters. That's why Yondazo gives you the tools to keep it safe. • Full backup and restore (JSON format) • Seamless data transfer when you switch devices • Automatic migration from older versions ■ WHO IT'S FOR • Readers who want a simple way to log the books they finish • Anyone curious about how many books they read each month • People who like comparing this year's reading with last year's • Readers who enjoy reflecting on their habits through data • Anyone who wants AI to help them spot patterns in their reading • Readers who like keeping notes and impressions of each book

Screenshots

読書メモ4 screens
Yondazo4 screens

Verdict

The call

The clearest difference is in-app purchases: Yondazo at none against 読書メモ's 1. 読書メモ's advantage is update cadence (every 3 months vs every 32 months) and iOS requirement (12.0 vs 18.0). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 読書メモ sells 1 one-off in-app purchase. Yondazo asks for nothing beyond the download.

UpkeepUpdate frequency

読書メモ ships an update every 3 months, Yondazo every 32 months. The most recent releases landed on July 19, 2026 and September 22, 2026 respectively.

Scorecard3 real differences · 6 level
読書メモ versus Yondazo: the parameters behind the verdict, then further details
Parameter読書メモYondazo
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 3 months — betterEvery 32 months
AdsNoNo
In-app purchasesYesNo — better
Monetization—Ad-supported
DevicesiPhone, iPodiPhone, iPad
Requires iOS12.0 — better18.0
Further details — not scored
Size1 MB7 MB
Age rating4++4
Developerenaksoft.comarakawa yuichiro

In-app purchases

1 purchases

読書メモ

One-time1
  • データ追加の回数制限解除$1.99
None

Yondazo

No in-app purchases

Questions

Is 読書メモ free?
読書メモ is free to download, with in-app purchases available.
Is Yondazo free?
Yondazo is free to download, with no in-app purchases.
Do 読書メモ or Yondazo have ads?
Neither 読書メモ nor Yondazo shows ads.
Which is updated more often, 読書メモ or Yondazo?
読書メモ ships an update every 3 months, and Yondazo every 32 months. Most recently, 読書メモ was updated on July 19, 2026 and Yondazo on September 22, 2026.

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