# Zetamac Arithmetic Practice vs Fathomly

The clearest difference is in-app purchases: Zetamac Arithmetic Practice at none against Fathomly's 3. Zetamac Arithmetic Practice also leads on update cadence (daily vs every 3 weeks) and ratings volume (19 vs 1). Fathomly's advantage is rating (5.0 vs 4.7) and iOS requirement (15.0 vs 17.5). On price, ads and device support there is nothing between them.

Both are free to download. Fathomly sells 3 in-app purchases, starting at $2.99 per 7 days. Zetamac Arithmetic Practice asks for nothing beyond the download.

Fathomly holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Zetamac Arithmetic Practice has 19 ratings behind it against 1, so its average is the more settled of the two.

Zetamac Arithmetic Practice ships an update daily, Fathomly every 3 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | Zetamac Arithmetic Practice | Fathomly |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (19 ratings)](https://appshunter.io/ios/app/zetamac-arithmetic-practice/id6737153617/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fathomly-learn-by-doing/id6800842023/reviews)** |
| Number of ratings | **19** | 1 |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 3 weeks |
| Monetization | Free | — |
| Size | 1 MB | 12 MB |
| Requires iOS | 17.5 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Joseph Ma](https://appshunter.io/developer/1774979062) | [jake green](https://appshunter.io/developer/1845576374) |

## What reviewers say

### Zetamac Arithmetic Practice

[App page](https://appshunter.io/ios/app/zetamac-arithmetic-practice/id6737153617)

This app offers mental math practice tailored for quantitative finance professionals. It focuses on improving calculation speed and accuracy for complex numerical problems.

**Highlights:** Mental math practice, Quantitative finance focus, Calculation speed improvement, Accuracy enhancement, Numerical problem solving

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

**In-app purchases:** none


### Fathomly

[App page](https://appshunter.io/ios/app/fathomly-learn-by-doing/id6800842023)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fathomly Scholar | $2.99 | per 7 days |
| Fathomly Scholar | $9.99 | per month |
| Fathomly Scholar | $79.99 | per year |


## Frequently asked questions

### Is Zetamac Arithmetic Practice free?

Zetamac Arithmetic Practice is free to download, with no in-app purchases.

### Is Fathomly free?

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

### Which has better reviews, Zetamac Arithmetic Practice or Fathomly?

Fathomly is rated higher. Zetamac Arithmetic Practice averages 4.7 out of 5 from 19 ratings, while Fathomly averages 5.0 from 1 ratings.

### Do Zetamac Arithmetic Practice or Fathomly have ads?

Neither Zetamac Arithmetic Practice nor Fathomly shows ads.

### Which is updated more often, Zetamac Arithmetic Practice or Fathomly?

Zetamac Arithmetic Practice ships an update daily, and Fathomly every 3 weeks. Most recently, Zetamac Arithmetic Practice was updated on October 24, 2026 and Fathomly on October 24, 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.*