# Zetamac Arithmetic Practice vs Devmaxx

The clearest difference is review sentiment: Zetamac Arithmetic Practice at 83% against Devmaxx's 17%. Zetamac Arithmetic Practice also leads on in-app purchases (none vs 2) and update cadence (daily vs every 2 weeks). Devmaxx's advantage is ratings volume (520 vs 18). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Devmaxx sells 2 in-app purchases, starting at $8.99 per month. Zetamac Arithmetic Practice asks for nothing beyond the download.

Zetamac Arithmetic Practice holds the better App Store score, 4.7 against 4.3. That said, the two scores are not equally well evidenced: Devmaxx has 520 ratings behind it against 18, so its average is the more settled of the two. Written reviews point the same way: 83% of Zetamac Arithmetic Practice's written reviews are positive against 17% of Devmaxx's.

Zetamac Arithmetic Practice ships an update daily, Devmaxx every 2 weeks. The most recent releases landed on October 10, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Zetamac Arithmetic Practice | Devmaxx |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (18 ratings)](https://appshunter.io/ios/app/zetamac-arithmetic-practice/id6737153617/reviews)** | [4.3 (520 ratings)](https://appshunter.io/ios/app/devmaxx/id6758278144/reviews) |
| Number of ratings | 18 | **520** |
| Positive reviews | **83.3% of reviews** | 17.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 2 weeks |
| Monetization | **Free** | Subscription |
| Size | 1 MB | 29 MB |
| Requires iOS | 17.5 | 17.5 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Joseph Ma](https://appshunter.io/developer/1774979062) | [Arjay McCandless LLC](https://appshunter.io/developer/1871931520) |

## 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


### Devmaxx

[App page](https://appshunter.io/ios/app/devmaxx/id6758278144)

This app provides a daily system design question to help software engineers master essential skills for interviews and career growth. It offers clear explanations, linked resources, and a private community for learning and practice.

**Highlights:** Daily system design questions, Clear explanations and answer breakdowns, Linked learning resources, Access to previous questions, Private developer community, Progress tracking

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Devmaxx Subscription | $8.99 | per month |
| Annual Devmaxx Subscription | $59.99 | per year |


## Frequently asked questions

### Is Zetamac Arithmetic Practice free?

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

### Is Devmaxx free?

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

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

Zetamac Arithmetic Practice is rated higher. Zetamac Arithmetic Practice averages 4.7 out of 5 from 18 ratings, while Devmaxx averages 4.3 from 520 ratings.

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

Neither Zetamac Arithmetic Practice nor Devmaxx shows ads.

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

Zetamac Arithmetic Practice ships an update daily, and Devmaxx every 2 weeks. Most recently, Zetamac Arithmetic Practice was updated on October 10, 2026 and Devmaxx on October 13, 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.*