# Stockfish Chess Analysis vs Challenge World

The clearest difference is update cadence: Challenge World at every 5 days against Stockfish Chess Analysis's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Stockfish Chess Analysis sells 3 in-app purchases, starting at $8.99 per 7 days and Challenge World sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Stockfish Chess Analysis ships an update fortnightly, Challenge World every 5 days. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Stockfish Chess Analysis | Challenge World |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (81 ratings)](https://appshunter.io/ios/app/stockfish-chess-analysis/id6744956284/reviews)** | — |
| Number of ratings | **81** | — |
| Positive reviews | 14.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 30 MB | 88 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Krishna Sangeeth KS](https://appshunter.io/developer/1796652653) | [Eric Martial Kameni](https://appshunter.io/developer/1893185746) |

## What reviewers say

### Stockfish Chess Analysis

[App page](https://appshunter.io/ios/app/stockfish-chess-analysis/id6744956284)

Analyze chess positions from a photo or by inputting moves. Get AI-powered best move suggestions, learn tactics, and play against the engine with live tips. Ideal for players of all levels looking to improve their game.

**Highlights:** Scan chessboards from photos, AI-powered best move suggestions, Learn new chess tactics, Play against Stockfish engine, Live help and tips during play, Multiple difficulty levels

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $8.99 | per 7 days |
| Monthly Subscription | $17.99 | per month |
| Yearly Subscription | $69.99 | per year |


### Challenge World

[App page](https://appshunter.io/ios/app/challenge-world/id6771152172)

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Synapse Tier | $0.99 | one-time |
| Cortex Tier | $0.99 | one-time |
| Nexus Tier | $0.99 | one-time |
| Zenith Tier | $0.99 | one-time |
| Apex Tier | $0.99 | one-time |
| Head-to-Head Mode | $0.99 | one-time |


## Frequently asked questions

### Is Stockfish Chess Analysis free?

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

### Is Challenge World free?

Challenge World is free to download, with in-app purchases available.

### Do Stockfish Chess Analysis or Challenge World have ads?

Neither Stockfish Chess Analysis nor Challenge World shows ads.

### Which is updated more often, Stockfish Chess Analysis or Challenge World?

Stockfish Chess Analysis ships an update fortnightly, and Challenge World every 5 days. Most recently, Stockfish Chess Analysis was updated on October 30, 2026 and Challenge World on October 28, 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.*