# PGN Trainer vs Aritmo

The clearest difference is ads: PGN Trainer at none against Aritmo's shown. Aritmo's advantage is update cadence (every 2 days vs every 4 days) and iOS requirement (16.0 vs 18.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. PGN Trainer sells 3 in-app purchases, starting at $7.99 per year and Aritmo sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

PGN Trainer ships an update every 4 days, Aritmo every 2 days. The most recent releases landed on October 24, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | PGN Trainer | Aritmo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pgn-trainer-chess-openings/id6757391707/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 days | **Every 2 days** |
| Monetization | Freemium | — |
| Size | 121 MB | 13 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Smart World Innovations LLC](https://appshunter.io/developer/1866576406) | [LUCCA EMMANUEL PINELI SIMOES LTDA](https://appshunter.io/developer/1884998353) |

## What reviewers say

### PGN Trainer

[App page](https://appshunter.io/ios/app/pgn-trainer-chess-openings/id6757391707)

Master chess openings with a personalized repertoire builder. Organize, search, and train your lines using spaced repetition and engine analysis. Syncs across devices for on-the-go learning.

**Highlights:** Build and organize custom chess opening repertoires, Import PGN files or use built-in libraries, Advanced search by move sequence, ECO name, or number, Study, train, and analyze with engine integration, Spaced repetition for memory training, Cloud sync across iPhone, iPad, and Mac

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| QueenBeak | $7.99 | per year |
| KnightBeak | $5.99 | one-time |
| KingBeak | $19.99 | one-time |


### Aritmo

[App page](https://appshunter.io/ios/app/aritmo/id6760564207)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Aritmo Premium | $3.99 | per month |
| Aritmo Yearly Premium Access | $29.99 | per year |


## Frequently asked questions

### Is PGN Trainer free?

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

### Is Aritmo free?

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

### Do PGN Trainer or Aritmo have ads?

Aritmo shows ads; PGN Trainer does not.

### Which is updated more often, PGN Trainer or Aritmo?

PGN Trainer ships an update every 4 days, and Aritmo every 2 days. Most recently, PGN Trainer was updated on October 24, 2026 and Aritmo on October 8, 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.*