# Zetamac problems vs MentalMultiply

The clearest difference is in-app purchases: Zetamac problems at none against MentalMultiply's 2. MentalMultiply's advantage is ads (none vs shown) and update cadence (fortnightly vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. MentalMultiply sells 2 in-app purchases, starting at $4.99 per year. Zetamac problems asks for nothing beyond the download.

Zetamac problems ships an update every 2 months, MentalMultiply fortnightly. The most recent releases landed on September 29, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Zetamac problems | MentalMultiply |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/zetamac-problems/id6743952737/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Ad-supported | — |
| Size | 4 MB | 6 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Chhaya Patel](https://appshunter.io/developer/1736176770) | [Oren Frenkel](https://appshunter.io/developer/6787527169) |

## What reviewers say

### Zetamac problems

[App page](https://appshunter.io/ios/app/zetamac-problems/id6743952737)

Sharpen your math skills with daily practice problems. This app offers diverse problem types, customizable difficulty, and timed challenges to prepare for exams and interviews. Get instant feedback to improve your accuracy and speed.

**Highlights:** Diverse math problem types, Customizable number range, Timed practice challenges, Realistic quantitative simulations, Instant feedback on answers

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

**In-app purchases:** none


### MentalMultiply

[App page](https://appshunter.io/ios/app/mentalmultiply/id6787527166)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Premium | $4.99 | per year |
| Lifetime Premium | $14.99 | one-time |


## Frequently asked questions

### Is Zetamac problems free?

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

### Is MentalMultiply free?

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

### Do Zetamac problems or MentalMultiply have ads?

Zetamac problems shows ads; MentalMultiply does not.

### Which is updated more often, Zetamac problems or MentalMultiply?

Zetamac problems ships an update every 2 months, and MentalMultiply fortnightly. Most recently, Zetamac problems was updated on September 29, 2026 and MentalMultiply on September 21, 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.*