# Virtual Window vs Mental Math Games

The clearest difference is in-app purchases: Virtual Window at none against Mental Math Games's 7. Virtual Window also leads on device support (3 vs 1) and iOS requirement (15.0 vs 26.0). Mental Math Games's advantage is update cadence (every 9 days vs every 3 months). On price and ads there is nothing between them.

Both are free to download. Mental Math Games sells 7 in-app purchases, starting at $4.99 per month. Virtual Window asks for nothing beyond the download.

Virtual Window ships an update every 3 months, Mental Math Games every 9 days. The most recent releases landed on October 6, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Virtual Window | Mental Math Games |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (1.2K ratings)](https://appshunter.io/ios/app/mental-math-games-numbio/id1551025256/reviews)** |
| Number of ratings | — | **1.2K** |
| Positive reviews | — | 93.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 9 days** |
| Monetization | — | Free with in-app purchases |
| Size | 391 MB | 58 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [Stephan Calitz](https://appshunter.io/developer/1025300656) | [Peter Schmidt](https://appshunter.io/developer/1551025258) |

## What reviewers say

### Virtual Window

[App page](https://appshunter.io/ios/app/virtual-window/id1236886451)

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

**In-app purchases:** none


### Mental Math Games

[App page](https://appshunter.io/ios/app/mental-math-games-numbio/id1551025256)

Sharpen your mental math skills with this app offering a wide range of exercises from basic arithmetic to fractions and percentages. It features timed challenges, progress tracking, and customizable modes to suit all levels.

**Highlights:** Wide variety of math exercises, Timed challenges for speed, Progress tracking and high scores, Adjustable difficulty levels, Math tricks and shortcuts, Customizable trainer mode, Achievements and rewards

**Features:** Family Sharing

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $4.99 | per month |
| Pro access (secret discount) | $9.99 | per year |
| Pro Annual | $17.99 | per year |
| Small tip | $0.99 | one-time |
| Medium tip | $3.99 | one-time |
| Large tip | $8.99 | one-time |
| Pro Lifetime | $49.99 | one-time |

**What reviewers like**

- 🚀 Helpful for learning math
- 👍 Fun and engaging
- 👍 Clean and intuitive interface
- 🚀 Effective for improving mental math skills
- 👍 Great for all ages

**What reviewers complain about**

- 💰 Limited features in free version
- 🔒 Subscription required for full access
- 🐛 Occasional performance issues

**Reported bugs**

- Inconsistent scoring feedback
- Subscription issues with repeated charges

**Requested features**

- More advanced math operations (e.g., powers, roots)
- Customizable practice sessions
- Detailed performance analytics
- Ability to review past questions


## Frequently asked questions

### Is Virtual Window free?

Virtual Window is free to download, with no in-app purchases.

### Is Mental Math Games free?

Mental Math Games is free to download, with in-app purchases available.

### Do Virtual Window or Mental Math Games have ads?

Neither Virtual Window nor Mental Math Games shows ads.

### Which is updated more often, Virtual Window or Mental Math Games?

Virtual Window ships an update every 3 months, and Mental Math Games every 9 days. Most recently, Virtual Window was updated on October 6, 2026 and Mental Math Games on October 20, 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.*