# Encyclopedia 2 by Informant vs GPT Chess

The clearest difference is review sentiment: Encyclopedia 2 by Informant at 100% against GPT Chess's 33%. Encyclopedia 2 by Informant also leads on rating (4.9 vs 4.2) and iOS requirement (8.0 vs 16.0). GPT Chess's advantage is update cadence (every 9 days vs every 4 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Encyclopedia 2 by Informant sells 1 one-off in-app purchase and GPT Chess sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Encyclopedia 2 by Informant holds the better App Store score, 4.9 against 4.2. Both are backed by a comparable volume of ratings — 15 and 17 respectively. Written reviews point the same way: 100% of Encyclopedia 2 by Informant's written reviews are positive against 33% of GPT Chess's.

Encyclopedia 2 by Informant ships an update every 4 months, GPT Chess every 9 days. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Encyclopedia 2 by Informant | GPT Chess |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (15 ratings)](https://appshunter.io/ios/app/encyclopedia-2-by-informant/id1256485183/reviews)** | [4.2 (17 ratings)](https://appshunter.io/ios/app/gpt-chess/id6477067680/reviews) |
| Number of ratings | 15 | **17** |
| Positive reviews | **100.0% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 44 MB | 88 MB |
| Requires iOS | **8.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Chess King](https://appshunter.io/developer/1096660597) | [FusionX Tech LLC](https://appshunter.io/developer/1773335201) |

## What reviewers say

### Encyclopedia 2 by Informant

[App page](https://appshunter.io/ios/app/encyclopedia-2-by-informant/id1256485183)

This educational tool offers systematic chess training with intermediate-level combinations sorted by theme. It provides interactive lessons, hints, and explanations to help players improve their tactical skills and understanding of the game.

**Highlights:** Systematic chess combinations, Intermediate level training (ELO 2200), Themed sorting of tactics, Interactive theoretical lessons, Hints and mistake refutations, Play against computer, Rating monitoring

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Course | $9.99 | one-time |


### GPT Chess

[App page](https://appshunter.io/ios/app/gpt-chess/id6477067680)

Engage in chess matches against advanced AI models like ChatGPT and Gemini. Choose between standard rules or a chaotic no-rule mode where AI instructions dictate gameplay. The app features conversational AI during play and offers multiple AI strength levels.

**Highlights:** Play against ChatGPT and Gemini AI, Standard chess rules mode, No-rule chess mode with AI instructions, Multiple AI strength levels, Conversational AI during gameplay, Minimalist design

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited APIs | $1.99 | per month |


## Frequently asked questions

### Is Encyclopedia 2 by Informant free?

Encyclopedia 2 by Informant is free to download, with in-app purchases available.

### Is GPT Chess free?

GPT Chess is free to download, with in-app purchases available.

### Which has better reviews, Encyclopedia 2 by Informant or GPT Chess?

Encyclopedia 2 by Informant is rated higher. Encyclopedia 2 by Informant averages 4.9 out of 5 from 15 ratings, while GPT Chess averages 4.2 from 17 ratings.

### Do Encyclopedia 2 by Informant or GPT Chess have ads?

Neither Encyclopedia 2 by Informant nor GPT Chess shows ads.

### Which is updated more often, Encyclopedia 2 by Informant or GPT Chess?

Encyclopedia 2 by Informant ships an update every 4 months, and GPT Chess every 9 days. Most recently, Encyclopedia 2 by Informant was updated on November 2, 2026 and GPT 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.*