# TestGorilla Prep vs Mental Math Interview Trainer

The clearest difference is in-app purchases: Mental Math Interview Trainer at none against TestGorilla Prep's 3. Mental Math Interview Trainer also leads on update cadence (every 2 days vs every 2 weeks). TestGorilla Prep's advantage is ads (none vs shown) and iOS requirement (15.0 vs 26.4). On price and device support there is nothing between them.

Both are free to download. TestGorilla Prep sells 3 in-app purchases, starting at $0.99 per 7 days. Mental Math Interview Trainer asks for nothing beyond the download.

TestGorilla Prep ships an update every 2 weeks, Mental Math Interview Trainer every 2 days. The most recent releases landed on October 10, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | TestGorilla Prep | Mental Math Interview Trainer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Size | 74 MB | 7 MB |
| Requires iOS | **15.0** | 26.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Mohcine Mabani](https://appshunter.io/developer/1884595591) | [Ludovic Lepic](https://appshunter.io/developer/1892835258) |

## What reviewers say

### TestGorilla Prep

[App page](https://appshunter.io/ios/app/testgorilla-prep-ccat-test/id6760470310)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscribe Weekly | $0.99 | per 7 days |
| Subscribe Monthly | $3.99 | per month |
| Subscribe Yearly | $19.99 | per year |


### Mental Math Interview Trainer

[App page](https://appshunter.io/ios/app/mental-math-interview-trainer/id6762084410)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TestGorilla Prep free?

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

### Is Mental Math Interview Trainer free?

Mental Math Interview Trainer is free to download, with no in-app purchases.

### Do TestGorilla Prep or Mental Math Interview Trainer have ads?

Mental Math Interview Trainer shows ads; TestGorilla Prep does not.

### Which is updated more often, TestGorilla Prep or Mental Math Interview Trainer?

TestGorilla Prep ships an update every 2 weeks, and Mental Math Interview Trainer every 2 days. Most recently, TestGorilla Prep was updated on October 10, 2026 and Mental Math Interview Trainer on October 2, 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.*