# Universal Library vs XYMYX·Chess

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.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

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.

## The numbers

| Metric | Universal Library | XYMYX·Chess |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/xymyxchess/id6741185012/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 40 months | **Every 4 weeks** |
| Monetization | — | Ad-supported |
| Size | 180 MB | 164 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jonathan Millen](https://appshunter.io/developer/1252268308) | [BATISCAFO LLC](https://appshunter.io/developer/1791134093) |

## What reviewers say

### Universal Library

[App page](https://appshunter.io/ios/app/universal-library/id1503995339)

**Features:** macOS Compatibility

**In-app purchases:** none


### XYMYX·Chess

[App page](https://appshunter.io/ios/app/xymyxchess/id6741185012)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*