# Chess Engine for Stockfish vs TerraNotes

The clearest difference is iOS requirement: TerraNotes at 13.0 against Chess Engine for Stockfish's 16.0. On price, update cadence, ads and in-app purchases 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 and TerraNotes sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Chess Engine for Stockfish ships an update every 5 weeks, TerraNotes every 2 months. The most recent releases landed on October 13, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Chess Engine for Stockfish | TerraNotes |
| --- | --- | --- |
| 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 | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 7 MB | 77 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Allegro Digital](https://appshunter.io/developer/1839170882) | [Maximilian Nocker](https://appshunter.io/developer/1816569059) |

## What reviewers say

### 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 |


### TerraNotes

[App page](https://appshunter.io/ios/app/terranotes/id6761076015)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TerraNotes Monthly | $3.99 | per month |
| TerraNotes Premium Yearly | $17.99 | per year |


## Frequently asked questions

### Is Chess Engine for Stockfish free?

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

### Is TerraNotes free?

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

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

Neither Chess Engine for Stockfish nor TerraNotes shows ads.

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

Chess Engine for Stockfish ships an update every 5 weeks, and TerraNotes every 2 months. Most recently, Chess Engine for Stockfish was updated on October 13, 2026 and TerraNotes on October 12, 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.*