Comparison

Chess Studio vs Epub Reader

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

Head to head
About

Chess Studio

Read chess books and instantly play through moves on screen. This app allows you to interact with chess e-books, automatically scrolling text and displaying positions on a board. Navigate variations, search content, and customize your reading experience.

Highlights
  • Play over moves on screen
  • Automatic text scrolling
  • Tap moves to display position
  • Navigate complex variations
  • Searchable content
  • Choice of layout options
Features
Read full description

Ever wanted to read your favourite chess books and be able to instantly play over the moves on screen? The revolutionary new Chess Studio, from renowned chess publishers Gambit, enables you to do that, and more. After downloading the free app, purchase your choice of classic chess e-books from the Gambit library and begin. • text laid out in usual clear Gambit style • play over moves and variations on screen • accompanying text scrolls automatically • tap any chess move and the position appears on the board • easily navigate through complex variations • search function for words, phrases, player names • move swiftly between games and chapters • choice of layout options - including flip board • free sample text available to try out the app Chess Studio represents an enjoyable and portable new way of reading chess books, designed by chess players for chess players. Overseeing every aspect of the app design was Grandmaster John Nunn, one of the best-respected figures in the chess world and three-times World Chess Solving Champion.

About

Epub Reader

This app offers a seamless reading experience for various ebook formats including EPUB, PDF, and CHM. It supports multiple compression formats and provides features like table of contents, note-taking, and bookmarking. Customize your reading with adjustable font sizes.

Highlights
  • Supports EPUB, PDF, CHM, RTF formats
  • Opens compressed files (ZIP, RAR, 7Zip)
  • Table of Contents navigation
  • Note-taking functionality
  • Bookmark management
  • Customizable font size
Features
Currently charting
Read full description

Epub Reader: Ultimate Ebook & Comic Viewer Experience seamless reading with a powerful, all-in-one document viewer designed for iOS. Now fully compatible with Kindle and Amazon ebook formats! All-in-One Format Support • Kindle Formats: MOBI, AZW, AZW3, AZW4, PRC • Ebooks & Docs: EPUB, PDF, CHM, RTF • Comics & Archives: CBZ, CBR, ZIP, RAR, 7Z, GZIP, TAR Key Features: • Smart Navigation: Effortlessly browse and skip chapters with the interactive Table of Contents. • Personalized Reading: Highlight text, take inline notes, and save your favorite pages with bookmarks. • Fully Customizable: Adjust font sizes and layouts to read comfortably, day or night. • Easy File Transfer: Instantly import books via Wi-Fi (desktop browser) or iTunes File Sharing. #Permanent professional version: * Make a one-time purchase and resume purchases anytime, anywhere. #Annual professional version: * Annual auto-renewable subscription, automatic renewal upon expiration. * Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's iTunes Account Settings after purchase. Privacy Policy: https://junjie-5cfc2.web.app/epubreader/privacypolicy.html Terms of Use: https://junjie-5cfc2.web.app/epubreader/terms.html Contact us: marryapps@163.com

Screenshots

Chess Studio4 screens
Epub Reader4 screens

Verdict

The call

The clearest difference is ads: Chess Studio at none against Epub Reader's shown. Chess Studio also leads on iOS requirement (9.0 vs 15.0). Epub Reader's advantage is update cadence (every 11 days vs every 2 months) and chart position (#130 vs unranked). On price, review sentiment, in-app purchases and monetization model 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. Chess Studio sells 23 one-off in-app purchases and Epub Reader sells 4 in-app purchases, starting at $3.99 per year. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Chess Studio ships an update every 2 months, Epub Reader every 11 days. The most recent releases landed on September 9, 2026 and September 24, 2026 respectively.

Scorecard4 real differences · 7 level
Chess Studio versus Epub Reader: the parameters behind the verdict, then further details
ParameterChess StudioEpub Reader
PriceFreeFree
Rating—4.5 (11K ratings) — better
Positive reviews60.0% of reviews — better55.3% of reviews
Number of ratings—11K — better
Update frequencyEvery 2 monthsEvery 11 days — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank—#130 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better15.0
Further details — not scored
Size11 MB70 MB
Age rating4+4+
DeveloperGambit Publications俐 马

Customer experience

Chess Studio

Written reviews30 reviews
Positive60.0%
Neutral6.7%
Negative33.3%

Epub Reader

All ratings11,177 ratings
Positive88.3%
Neutral3.6%
Negative8.0%
Written reviews1,075 reviews
Positive55.3%
Neutral10.4%
Negative34.3%

Bugs and requests

Chess Studio

Not enough reviews yet to summarise bugs or requests.

Epub Reader

Reported bugs

3 issues
  • Crashes when opening certain files
  • Distorts images in some ebooks
  • Fails to open ePub files consistently

Requested features

5 requests
  • Add dark mode
  • Improve bookmark and progress tracking
  • Implement search feature
  • Increase customization options
  • Allow variable screen timeout

In-app purchases

23 purchases

Chess Studio

One-time23
  • Gambit Free SamplesFree
  • How to Beat Your Dad at Chess$9.99
  • Win with the Stonewall Dutch$9.99
Show 20 more
  • 50 Essential Chess Lessons$10.99
  • Idiot-Proof Chess Repertoire$10.99
  • Win with the London System$11.99
  • Learn Chess Tactics$11.99
  • Understanding the Chess Openings$11.99
  • A Simple Chess Opening Repertoire for White$11.99
  • Understanding Chess Endgames$13.99
  • Understanding Chess Middlegames$13.99
  • Understanding Chess Move by Move$13.99
  • Secrets of Modern Chess Strategy$13.99
  • Mastering the Chess Openings Volume 1$13.99
  • Mastering the Chess Openings Volume 2$13.99
  • A Strategic Chess Opening Repertoire for White$14.99
  • John Nunn's Chess Course$14.99
  • Fundamental Chess Openings$14.99
  • Fundamental Chess Endings$14.99
  • How to Play Chess Endgames$14.99
  • Nunn's Chess Endings Volume 1$14.99
  • Nunn's Chess Endings Volume 2$14.99
  • Mammoth Book of Greatest Games$14.99
4 purchases

Epub Reader

Subscriptions1
  • Annual professional version$3.991 Year
One-time3
  • Remove Ads$0.99
  • Passcode Lock$0.99
  • Pro Version$5.99

Questions

Is Chess Studio free?
Chess Studio is free to download, with in-app purchases available.
Is Epub Reader free?
Epub Reader is free to download, with in-app purchases available.
Do Chess Studio or Epub Reader have ads?
Epub Reader shows ads; Chess Studio does not.
Which is updated more often, Chess Studio or Epub Reader?
Chess Studio ships an update every 2 months, and Epub Reader every 11 days. Most recently, Chess Studio was updated on September 9, 2026 and Epub Reader on September 24, 2026.

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