# Aritmo vs Chess Openings

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

Both are free to download. Aritmo sells 2 in-app purchases, starting at $3.99 per month and Chess Openings sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Aritmo ships an update every 2 days, Chess Openings every 4 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Aritmo | Chess Openings |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/chess-openings-prologue/id6789625585/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Every 4 days |
| Monetization | — | Free with in-app purchases |
| Size | 13 MB | 20 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [LUCCA EMMANUEL PINELI SIMOES LTDA](https://appshunter.io/developer/1884998353) | [AGENCE DEBORD EURL](https://appshunter.io/developer/1538454909) |

## What reviewers say

### 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 |


### Chess Openings

[App page](https://appshunter.io/ios/app/chess-openings-prologue/id6789625585)

Learn chess openings by actively playing them through guided, hinted, and memory recall stages. Build a personalized repertoire of over 300 verified openings, with spaced repetition for long-term retention. Designed for adult club players seeking a calm, distraction-free learning experience.

**Highlights:** Learn by playing moves, Guided, hinted, and memory recall modes, 300+ verified openings, Spaced-repetition review, Build custom repertoire, Distraction-free design

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Prologue Monthly | $9.99 | per month |
| Prologue Yearly | $39.99 | per year |


## Frequently asked questions

### Is Aritmo free?

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

### Is Chess Openings free?

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

### Do Aritmo or Chess Openings have ads?

Aritmo shows ads; Chess Openings does not.

### Which is updated more often, Aritmo or Chess Openings?

Aritmo ships an update every 2 days, and Chess Openings every 4 days. Most recently, Aritmo was updated on October 31, 2026 and Chess Openings on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*