# Write Your Fantastic Thesis vs (Open Source) Mental Math

The clearest difference is price: (Open Source) Mental Math at Free against Write Your Fantastic Thesis's $9.99. (Open Source) Mental Math also leads on in-app purchases (none vs 3). On update cadence, ads, device support and iOS requirement there is nothing between them.

(Open Source) Mental Math is free to download; Write Your Fantastic Thesis costs $9.99 up front. Write Your Fantastic Thesis sells 3 in-app purchases, starting at $9.99 per 7 days. (Open Source) Mental Math asks for nothing beyond the download.

Write Your Fantastic Thesis ships an update every 2 months, (Open Source) Mental Math every 5 weeks. The most recent releases landed on October 20, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Write Your Fantastic Thesis | (Open Source) Mental Math |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/open-source-mental-math/id6788418444/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | — | Free |
| Size | 7 MB | 41 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Richardson](https://appshunter.io/developer/1887851473) | [AHMET EMRE DEDELER](https://appshunter.io/developer/1870913629) |

## What reviewers say

### Write Your Fantastic Thesis

[App page](https://appshunter.io/ios/app/write-your-fantastic-thesis/id6763897458)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly AI Support | $9.99 | per 7 days |
| WYFT Pro Monthly | $24.99 | per month |
| WYFT Pro Annual | $149.99 | per year |


### (Open Source) Mental Math

[App page](https://appshunter.io/ios/app/open-source-mental-math/id6788418444)

This application offers a free, open-source platform for practicing mental arithmetic. It features timed tests, custom drills, and a comprehensive library of mental math tricks. All content is available offline without ads or paywalls.

**Highlights:** Timed arithmetic tests, Customizable drills, Mental math tricks library, Offline progress tracking, Multiple operation types, Fast session interface

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

**In-app purchases:** none


## Frequently asked questions

### Is Write Your Fantastic Thesis free?

Write Your Fantastic Thesis costs $9.99, and also offers in-app purchases.

### Is (Open Source) Mental Math free?

(Open Source) Mental Math is free to download, with no in-app purchases.

### Do Write Your Fantastic Thesis or (Open Source) Mental Math have ads?

Neither Write Your Fantastic Thesis nor (Open Source) Mental Math shows ads.

### Which is updated more often, Write Your Fantastic Thesis or (Open Source) Mental Math?

Write Your Fantastic Thesis ships an update every 2 months, and (Open Source) Mental Math every 5 weeks. Most recently, Write Your Fantastic Thesis was updated on October 20, 2026 and (Open Source) Mental Math on October 6, 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.*