# Chess Notation Trainer vs CH3TRIS

The clearest difference is iOS requirement: CH3TRIS at 15.0 against Chess Notation Trainer's 18.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Chess Notation Trainer sells 1 one-off in-app purchase and CH3TRIS sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Chess Notation Trainer ships an update every 2 days, CH3TRIS every 3 days. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Chess Notation Trainer | CH3TRIS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (18 ratings)](https://appshunter.io/ios/app/chess-notation-trainer/id6476576060/reviews)** | — |
| Number of ratings | **18** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 3 days |
| Monetization | Free with in-app purchases | — |
| Size | 26 MB | 27 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nishat Majid](https://appshunter.io/developer/1727207034) | [Ramon Buzon](https://appshunter.io/developer/6783867847) |

## What reviewers say

### Chess Notation Trainer

[App page](https://appshunter.io/ios/app/chess-notation-trainer/id6476576060)

Master chess squares and notation with this training app. Improve your ability to identify coordinates, translate moves, and visualize the board, even without one. Ideal for serious players looking to enhance calculation speed and chess understanding.

**Highlights:** Identify squares by coordinate, Translate move sequences to notation, Determine square color instantly, Stay oriented on the board, Follow chess tutorials without a board, Speed up calculation, Practice blind chess

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $4.99 | one-time |


### CH3TRIS

[App page](https://appshunter.io/ios/app/ch3tris/id6783867845)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $3.00 | one-time |


## Frequently asked questions

### Is Chess Notation Trainer free?

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

### Is CH3TRIS free?

CH3TRIS is free to download, with in-app purchases available.

### Do Chess Notation Trainer or CH3TRIS have ads?

Neither Chess Notation Trainer nor CH3TRIS shows ads.

### Which is updated more often, Chess Notation Trainer or CH3TRIS?

Chess Notation Trainer ships an update every 2 days, and CH3TRIS every 3 days. Most recently, Chess Notation Trainer was updated on November 8, 2026 and CH3TRIS on October 31, 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.*