# PrepaMaths vs Hello STMG

The clearest difference is in-app purchases: Hello STMG at none against PrepaMaths's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. PrepaMaths sells 2 in-app purchases, starting at $8.99 per month. Hello STMG asks for nothing beyond the download.

PrepaMaths ships an update weekly, Hello STMG every 10 days. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | PrepaMaths | Hello STMG |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 10 days |
| Monetization | Subscription | — |
| Size | 77 MB | 23 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Julien DIEBOLD](https://appshunter.io/developer/1875332906) | [Mohamed YOUNES](https://appshunter.io/developer/1885515546) |

## What reviewers say

### PrepaMaths

[App page](https://appshunter.io/ios/app/prepamaths-maths-prepa-cpge/id6758949068)

This app offers comprehensive math preparation for engineering entrance exams. It includes detailed lessons, numerous exercises with solutions, interactive quizzes, and revision tools like flashcards and method sheets. Track your progress and practice in exam mode.

**Highlights:** 35 math chapters covering analysis, algebra, and more, 108 detailed lessons with professional LaTeX rendering, 999 corrected exercises with progressive hints, 45 interactive quizzes with integrated formulas, 455 flashcards with spaced repetition algorithm, Progress tracking with XP and statistics, Exam mode with integrated timer

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PrepaMaths Premium - Mensuel | $8.99 | per month |
| PrepaMaths Premium - Annuel | $69.99 | per year |


### Hello STMG

[App page](https://appshunter.io/ios/app/hello-stmg/id6760651433)

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

**In-app purchases:** none


## Frequently asked questions

### Is PrepaMaths free?

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

### Is Hello STMG free?

Hello STMG is free to download, with no in-app purchases.

### Do PrepaMaths or Hello STMG have ads?

Neither PrepaMaths nor Hello STMG shows ads.

### Which is updated more often, PrepaMaths or Hello STMG?

PrepaMaths ships an update weekly, and Hello STMG every 10 days. Most recently, PrepaMaths was updated on October 21, 2026 and Hello STMG on October 24, 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.*