Comparison

Universal Library vs XYMYX·Chess

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

Head to head
About

Universal Library

Features
Read full description

This game is a simulation of the universal library described in a short story, "The Library of Babel", by Jorge Luis Borges. The story can be found in several published collections and websites. As described, the Library contains all books of a certain size whose text is any possible sequence of lower-case letters and simple punctuation, even if it is nonsense. This simulation is of an interesting corner of the Library, tiny compared to the Borges vision, but large enough to get lost in. The game is an explorable virtual environment with a few treasure-hunt-like activities leading to books with meaningful content. There is a book that players can erase and rewrite to make into their own "personal vindication", and a book with a practically infinite number of pages. Individual books are searchable. You can mark and return easily to any alcove with an interesting book.

About

XYMYX·Chess

Experience chess with a revolutionary twist: simultaneous moves. This game transforms strategy with a new rhythm, offering a fair, vibrant, and unpredictable playing field. Rediscover the joy of pure exploration and thinking in every match.

Highlights
  • Simultaneous move gameplay
  • Transformed strategic universe
  • Fair and unpredictable matches
  • Focus on exploration and thinking
  • New rhythm in time
Features
Read full description

XYMYX·Chess is chess with simultaneous moves, where both players act at the same time. Without new pieces or a different board—only a new rhythm in time—it completely transforms the strategic universe and turns every match into a fair, vibrant, and unpredictable terrain. Chess is reborn in a new form. It invites us to play with the same curiosity and passion we felt the first time we discovered chess. Instead of memorizing openings or accumulating data, XYMYX·Chess brings players back to the pure experience of exploration, thinking, and enjoyment.

Screenshots

XYMYX·Chess3 screens

Verdict

The call

The clearest difference is ads: Universal Library at none against XYMYX·Chess's shown. Universal Library also leads on iOS requirement (12.0 vs 15.0). XYMYX·Chess's advantage is update cadence (every 4 weeks vs every 40 months) 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Universal Library ships an update every 40 months, XYMYX·Chess every 4 weeks. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 5 level
Universal Library versus XYMYX·Chess: the parameters behind the verdict, then further details
ParameterUniversal LibraryXYMYX·Chess
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 40 monthsEvery 4 weeks — better
AdsNo — betterYes
In-app purchasesNoNo
Monetization—Ad-supported
DevicesiPadiPhone, iPad, iPod — better
Requires iOS12.0 — better15.0
Further details — not scored
Size180 MB164 MB
Age rating4+4+
DeveloperJonathan MillenBATISCAFO LLC

In-app purchases

None

Universal Library

No in-app purchases

None

XYMYX·Chess

No in-app purchases

Questions

Is Universal Library free?
Universal Library is free to download, with no in-app purchases.
Is XYMYX·Chess free?
XYMYX·Chess is free to download, with no in-app purchases.
Do Universal Library or XYMYX·Chess have ads?
XYMYX·Chess shows ads; Universal Library does not.
Which is updated more often, Universal Library or XYMYX·Chess?
Universal Library ships an update every 40 months, and XYMYX·Chess every 4 weeks. Most recently, Universal Library was updated on November 7, 2026 and XYMYX·Chess on October 30, 2026.

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