# Prepa Herbart vs Mental Math

The clearest difference is in-app purchases: Prepa Herbart at none against Mental Math's 3. Mental Math's advantage is update cadence (weekly vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Mental Math sells 3 in-app purchases, starting at $3.99 per month. Prepa Herbart asks for nothing beyond the download.

Prepa Herbart ships an update every 3 weeks, Mental Math weekly. The most recent releases landed on October 9, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Prepa Herbart | Mental Math |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (3 ratings)](https://appshunter.io/ios/app/mental-math-calmenta/id6790559635/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | — | Freemium |
| Size | 2 MB | 73 MB |
| Requires iOS | 17.5 | **16.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [ARMANDO Perez Corona](https://appshunter.io/developer/1392827893) | [HelloProg](https://appshunter.io/developer/1866892083) |

## What reviewers say

### Prepa Herbart

[App page](https://appshunter.io/ios/app/prepa-herbart/id1633903021)

**Features:** macOS Compatibility

**In-app purchases:** none


### Mental Math

[App page](https://appshunter.io/ios/app/mental-math-calmenta/id6790559635)

This app transforms mental math practice into an engaging game. Solve calculations by writing answers directly on the screen, track progress with badges and records, and enjoy a child-friendly, ad-free experience with parental controls.

**Highlights:** Finger-based answer input, Timed calculation challenges, Multiple math operations, Progress tracking with badges, Parental controls and profiles, Ad-free and no data collection

**Features:** Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $3.99 | per month |
| Abonnement annuel | $9.99 | per year |
| Premium à vie | $22.99 | one-time |


## Frequently asked questions

### Is Prepa Herbart free?

Prepa Herbart is free to download, with no in-app purchases.

### Is Mental Math free?

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

### Do Prepa Herbart or Mental Math have ads?

Neither Prepa Herbart nor Mental Math shows ads.

### Which is updated more often, Prepa Herbart or Mental Math?

Prepa Herbart ships an update every 3 weeks, and Mental Math weekly. Most recently, Prepa Herbart was updated on October 9, 2026 and Mental Math on October 15, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*