# TGR vs Chess Engine for Stockfish

The clearest difference is in-app purchases: TGR at none against Chess Engine for Stockfish's 2. Chess Engine for Stockfish's advantage is update cadence (every 5 weeks vs every 28 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Chess Engine for Stockfish sells 2 in-app purchases, starting at $4.99 per 7 days. TGR asks for nothing beyond the download.

TGR ships an update every 28 months, Chess Engine for Stockfish every 5 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | TGR | Chess Engine for Stockfish |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.1 (31 ratings)](https://appshunter.io/ios/app/chess-engine-for-stockfish/id6753706741/reviews)** |
| Number of ratings | — | **31** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 5 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 108 MB | 7 MB |
| Requires iOS | 16.6 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [David Flores](https://appshunter.io/developer/1608413499) | [Allegro Digital](https://appshunter.io/developer/1839170882) |

## What reviewers say

### TGR

[App page](https://appshunter.io/ios/app/tgr-gps/id1608413497)

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

**In-app purchases:** none


### Chess Engine for Stockfish

[App page](https://appshunter.io/ios/app/chess-engine-for-stockfish/id6753706741)

Analyze chess positions with a powerful engine, create and edit boards, and import games from images or FEN strings. Save your favorite setups and customize the look with various themes and piece styles.

**Highlights:** Advanced analysis board, Intuitive board editor, Import from images/FEN, Saved positions, Customizable themes, Win probability analysis

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| Yearly Subscription | $29.99 | per year |


## Frequently asked questions

### Is TGR free?

TGR is free to download, with no in-app purchases.

### Is Chess Engine for Stockfish free?

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

### Do TGR or Chess Engine for Stockfish have ads?

Neither TGR nor Chess Engine for Stockfish shows ads.

### Which is updated more often, TGR or Chess Engine for Stockfish?

TGR ships an update every 28 months, and Chess Engine for Stockfish every 5 weeks. Most recently, TGR was updated on November 3, 2026 and Chess Engine for Stockfish on November 5, 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.*