# Mental Math Exercises vs Herman

The clearest difference is update cadence: Herman at every 10 days against Mental Math Exercises's every 2 months. Mental Math Exercises's advantage is price ($0.29 vs $2.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Mental Math Exercises costs $0.29 and Herman $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Mental Math Exercises ships an update every 2 months, Herman every 10 days. The most recent releases landed on September 9, 2026 and August 16, 2026 respectively.

## The numbers

| Metric | Mental Math Exercises | Herman |
| --- | --- | --- |
| Price | **$0.29** | $2.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/herman/id6743255218/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 10 days** |
| Monetization | — | Free |
| Size | 1 MB | 2 MB |
| Requires iOS | 17.6 | **16.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [仁超 张](https://appshunter.io/developer/1792659119) | [H Valeur](https://appshunter.io/developer/621824042) |

## What reviewers say

### Mental Math Exercises

[App page](https://appshunter.io/ios/app/mental-math-exercises/id6741766258)

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

**In-app purchases:** none


### Herman

[App page](https://appshunter.io/ios/app/herman/id6743255218)

This app offers over 300 unique calculators for finance, math, and everyday problems. It provides a user-friendly interface for quick and accurate calculations, working offline for convenience.

**Highlights:** Over 300 unique calculators, Finance and business calculations, Math and fraction tools, Unit conversions (length, mass, time, volume), Offline functionality, User-friendly design

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

**In-app purchases:** none


## Frequently asked questions

### Is Mental Math Exercises free?

Mental Math Exercises costs $0.29, with no in-app purchases.

### Is Herman free?

Herman costs $2.99, with no in-app purchases.

### Do Mental Math Exercises or Herman have ads?

Neither Mental Math Exercises nor Herman shows ads.

### Which is updated more often, Mental Math Exercises or Herman?

Mental Math Exercises ships an update every 2 months, and Herman every 10 days. Most recently, Mental Math Exercises was updated on September 9, 2026 and Herman on August 16, 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.*