Comparison

CHMate vs ダイヤモンドZAi

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

Head to head
About

CHMate

Transform your personal ebook files into a comfortable reading experience with a customizable virtual bookshelf. Enjoy tailored typography, import your own fonts, and organize your collection with decorative elements and personal photos. Read EPUB and CHM files offline with powerful search and annotation tools.

Highlights
  • Customizable virtual bookshelf with ambient lighting
  • Decorate shelves with photos, videos, and ornaments
  • Tailored typography with adjustable fonts and page colors
  • Import custom font files
  • Read EPUB and CHM files offline
  • Full-text search and annotation tools
  • Local Wi-Fi file transfer
Features
Read full description

Default ebook formatting does not always suit the way you read. CHMate turns your personal files into a calm, comfortable reading corner. A customizable wooden bookshelf with an ambient lamp and personal decor. Download free. Unlock multiple books with a single one-time purchase. A BOOKSHELF OF YOUR OWN • Wooden shelves and ambient lamp: Display your personal collection with warm bookshelf lighting. • Shelf decor: Arrange animated ornaments, plants, paintings, and shelf-edge figures. • Personal memories: Decorate with photos, Live Photos, or silent looping videos (MP4/MOV). • Custom layout: Freely move, resize, and favorite your decor items. TAILORED TYPOGRAPHY • Page colors: Choose from six page colors independently of your typography theme, with light, dark, or automatic appearance. • Precise reading controls: Adjust font size, line height, page margins, and fonts for body, headings, and code. • Custom font import: Read with built-in fonts or import your own font files. • Horizontal and vertical reading: Switch text orientation where supported for Chinese and Japanese text. • iCloud theme sync: Save your custom typography themes and sync them across your devices. TOOLS & LOCAL IMPORT • Supported formats: Read your own EPUB and CHM files with structured table of contents navigation. • Local Wi-Fi transfer: Send files directly from your computer browser over your local network. • Reading tools: Search full text across chapters, add highlights, and review notes in one place. HONEST PRICING • Free download with complete reading features for your current book. • Unlock multiple books with a single one-time in-app purchase. • No subscriptions and no ads.

About

ダイヤモンドZAi

This comprehensive money magazine covers investing, stocks, investment trusts, and FX for all generations. It provides easy-to-understand financial information in an engaging format. Digital editions may differ from print versions and may not include paper supplements.

Highlights
  • Comprehensive money magazine
  • Covers stocks, investment trusts, FX
  • Easy-to-understand financial information
  • Digital edition available
  • Subscription options
  • Automatic downloads
Features
Read full description

///////////////////////// ------------------------------------------------------- 「あらゆる世代のための『攻め』と『守り』の総合マネー誌 ------------------------------------------------------- あらゆる世代のための「攻め」と「守り」の総合マネー誌。株式・投信信託・FXを中心とし、充実したマネー情報をわかりやすく楽しい誌面で読者に紹介します。 ※電子版では、紙の雑誌と内容が一部異なります。また、紙版の付録は付属されませんので、ご注意ください。 また、著作権等の問題で掲載されないページがあります。あらかじめご了承ください。 ●ライセンス期間について 本アプリをダウンロード後、サブスクリプションライセンスをご購入いただくと、ライセンス期間内に発売される号をご覧いただけます。 ●自動ダウンロードについて ライセンス期間中に、自動ダウンロードをオンに設定すると、毎月21日(予定)に最新号がアップデートされ次第、自動的にダウンロードされます(お使いのiOS端末がwi-fi接続されている時のみ有効。アップデート日時は予告なく変更する場合があります)。 *iOS14の自動ダウンロードの設定方法は、下記の通りです。 設定>一般>Appバックグラウンド更新>ダイヤモンドZAi>オン ※自動継続について 本アプリで購入できるライセンスには自動継続機能がついており、ライセンス期間が終了すると自動的に期間が延長され、最初に購入いただいたライセンスが再度購入されます。 自動継続を停止するには、ライセンス期間終了の24時間以上前に、お使いの端末のアカウント設定画面で設定を変更します。 iOSデバイスのトップ画面から「設定」->「APPLE ID」->サブスクリプションより設定を変更することができます。 なお、ライセンス期間中は、期間の変更や払い戻しをすることができませんのでご了承ください。 ※使用端末について ライセンスを購入したApple IDからは、本アプリに対応した5つのiOS端末でコンテンツを観覧することができます。 ライセンスを購入した端末以外の端末からコンテンツを観覧する場合や、アプリを一旦削除して再インストールした場合は、ライセンスを購入したApple IDでログインしたあと、本アプリを起動し、「設定」->「定期購読状態をリストア」をタップしてください。 プライバシーポリシー及び利用規約:http://www.diamond.co.jp/legal/Newsstand.html

Screenshots

CHMate4 screens
ダイヤモンドZAi4 screens

Verdict

The call

The clearest difference is review sentiment: CHMate at 55% against ダイヤモンドZAi's 0%. CHMate also leads on monetization model (free with in-app purchases vs subscription) and update cadence (every 2 weeks vs every 15 months). ダイヤモンドZAi's advantage is iOS requirement (9.0 vs 26.0). On price, ads, in-app purchases 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. CHMate sells 1 one-off in-app purchase and ダイヤモンドZAi sells 4 in-app purchases, starting at $7.49 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

CHMate ships an update every 2 weeks, ダイヤモンドZAi every 15 months. The most recent releases landed on November 6, 2026 and November 13, 2026 respectively.

Scorecard4 real differences · 6 level
CHMate versus ダイヤモンドZAi: the parameters behind the verdict, then further details
ParameterCHMateダイヤモンドZAi
PriceFreeFree
Rating3.9 (20 ratings) — better—
Positive reviews55.3% of reviews — better0.0% of reviews
Number of ratings20 — better—
Update frequencyEvery 2 weeks — betterEvery 15 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterSubscription
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.09.0 — better
Further details — not scored
Size51 MB31 MB
Age rating+44+
Developer贤安 陈DIAMOND, Inc.

Customer experience

CHMate

All ratings20 ratings
Positive70.0%
Neutral5.0%
Negative25.0%
Written reviews197 reviews
Positive55.3%
Neutral12.7%
Negative32.0%

ダイヤモンドZAi

Written reviews4 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

CHMate

Reported bugs

13 issues
  • App crashes when searching CHM files
  • Crashes when using tap-hold for bookmarking
  • Highlighting functionality broken after iOS updates
  • Notes and bookmarks not saving properly
  • Highlights disappear or move between chapters
Show 8 more
  • App crashes on startup or when opening files
  • Table of contents index expansion broken
  • Custom fonts blocked after iOS 14.5 update
  • Files not accessible via iCloud or Dropbox
  • Missing icons after updates
  • Images display as half-dark or missing
  • Text formatting changes not visible without page reload
  • First line spacing issues

Requested features

12 requests
  • Dark mode and additional color themes (Sepia)
  • Book cover display instead of text-only library view
  • PDF support
  • Text-to-speech functionality
  • Better pagination options
Show 7 more
  • iPad Pro resolution support
  • iOS multi-window support
  • Better bookmark functionality
  • Separate highlighting and annotation tools
  • Support for Cyrillic and Arabic text encoding
  • Collection/folder organization for multiple files
  • Zip file support for documentation sets

ダイヤモンドZAi

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

CHMate

One-time1
  • CHMate+$9.99
4 purchases

ダイヤモンドZAi

Subscriptions4
  • ダイヤモンドZAi$7.491 Month
  • ダイヤモンドZAi$21.493 Months
  • ダイヤモンドZAi$37.996 Months
Show 1 more
  • ダイヤモンドZAi$76.991 Year

Questions

Is CHMate free?
CHMate is free to download, with in-app purchases available.
Is ダイヤモンドZAi free?
ダイヤモンドZAi is free to download, with in-app purchases available.
Do CHMate or ダイヤモンドZAi have ads?
Neither CHMate nor ダイヤモンドZAi shows ads.
Which is updated more often, CHMate or ダイヤモンドZAi?
CHMate ships an update every 2 weeks, and ダイヤモンドZAi every 15 months. Most recently, CHMate was updated on November 6, 2026 and ダイヤモンドZAi on November 13, 2026.

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