Comparison

SuperX vs ChessBook Reader

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

Head to head
About

SuperX

This app enables Picture-in-Picture (PIP) video mode for a wide range of applications and browsers. It allows you to play videos from various sources, including local files, in a floating window. Enjoy multitasking by watching content while using other apps.

Highlights
  • Picture-in-Picture video mode
  • Supports most apps and browsers
  • Transfers video to in-app browser
  • Local file support (video, image, PDF)
  • Works with YouTube, Chrome, Safari, and more
Features
Read full description

• Picture-in-Picture Video Extension with support for Most apps • "Picture-in-Picture" Video Extension: - activates "Picture-in-Picture" video mode in Safari - transfers video to SuperX.app’s In-App Browser from other apps (YouTube, Chrome, etc). Support Local File: - Video - Image - PDF ... Other Is Coming Soon Supported Browsers: - Safari - Chrome - Brave - etc. Supported Apps: - YouTube - Vimeo - Facebook - TikTok - IGTV - etc. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://github.com/JRJian/SuperX_privacy

About

ChessBook Reader

Features
Read full description

ChessBook Reader — your chess library, brought to life Turn any chess book into an interactive study session. ChessBook Reader opens your PDF and EPUB chess books, recognizes the diagrams and move notation on the page, and lets you replay every game and variation on a real, interactive board — right beside the text. Whether you're working through a classic opening manual, an endgame treatise, or an annotated games collection, you'll never lose your place between the printed board and the moves again. WHY CHESSBOOK READER • Read PDF and EPUB chess books in a clean, distraction-free reader • Automatically recognizes board diagrams from the page • Understands chess notation — including older English descriptive notation (P-K4, Kt-QB3, PxP, Castles) • Tap through the moves and watch them play out on an interactive board • Built-in scanning: turn a paper book into a readable, playable file • Works fully offline — your books stay on your device • Sync moves live to a Chessnut Move board, or play out any position against the built-in chess engine FOR EVERY CHESS READER From beginners following their first opening book to club players studying classic masters, ChessBook Reader bridges the gap between reading about chess and actually playing through it. Chessnut Move board sync and Play vs Computer are free to try — 5 sessions total, shared between them. After that, a one-time Pro Unlock keeps both available for good, on every device you sign in on. Download ChessBook Reader and rediscover the chess books on your shelf.

Screenshots

SuperX4 screens
ChessBook Reader3 screens

Verdict

The call

The clearest difference is in-app purchases: ChessBook Reader at none against SuperX's 1. ChessBook Reader also leads on update cadence (monthly vs every 8 months). On price, ads, device support and iOS requirement 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. SuperX sells 1 one-off in-app purchase. ChessBook Reader asks for nothing beyond the download.

UpkeepUpdate frequency

SuperX ships an update every 8 months, ChessBook Reader monthly. The most recent releases landed on October 14, 2026 and October 5, 2026 respectively.

Scorecard2 real differences · 8 level
SuperX versus ChessBook Reader: the parameters behind the verdict, then further details
ParameterSuperXChessBook Reader
PriceFreeFree
Rating4.0 (19 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings19 — better—
Update frequencyEvery 8 monthsMonthly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS17.016.0 — better
Further details — not scored
Size4 MB133 MB
Age rating17+4+
Developer坚涛 陈Vu-Hung Quan

In-app purchases

1 purchases

SuperX

One-time1
  • None Ad Feature$0.99
None

ChessBook Reader

No in-app purchases

Questions

Is SuperX free?
SuperX is free to download, with in-app purchases available.
Is ChessBook Reader free?
ChessBook Reader is free to download, with no in-app purchases.
Do SuperX or ChessBook Reader have ads?
Neither SuperX nor ChessBook Reader shows ads.
Which is updated more often, SuperX or ChessBook Reader?
SuperX ships an update every 8 months, and ChessBook Reader monthly. Most recently, SuperX was updated on October 14, 2026 and ChessBook Reader on October 5, 2026.

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