# Grammatik Duell vs Math Experts

The clearest difference is review sentiment: Math Experts at 100% against Grammatik Duell's 25%. Grammatik Duell's advantage is price ($0.99 vs $4.99) and iOS requirement (12.0 vs 15.6). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

Grammatik Duell costs $0.99 and Math Experts $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Grammatik Duell ships an update every 2 months, Math Experts every 6 weeks. The most recent releases landed on September 21, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Grammatik Duell | Math Experts |
| --- | --- | --- |
| Price | **$0.99** | $4.99 |
| Positive reviews | 25.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Paid | Paid |
| Size | 15 MB | 28 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jan Essig](https://appshunter.io/developer/446378172) | [PATRICIA SAUER](https://appshunter.io/developer/1697710298) |

## What reviewers say

### Grammatik Duell

[App page](https://appshunter.io/ios/app/grammatik-duell/id968774654)

Practice German grammar and spelling through an engaging matching game. Choose from various grammatical areas and difficulty levels to improve your language skills. Compete against yourself or others in this fun, educational duel.

**Highlights:** German grammar and spelling practice, Matching game mechanics, Variable card pairs and player numbers, Adjustable difficulty levels, Read-aloud function, Focuses on grammatical areas, Reward system for motivation

**Features:** macOS Compatibility

**In-app purchases:** none


### Math Experts

[App page](https://appshunter.io/ios/app/math-experts-mental-math/id6451363057)

This app offers a distraction-free environment to practice various arithmetic operations, from basic math to advanced mental calculations. It provides customizable training options and multiple game modes to suit all ages and skill levels.

**Highlights:** Customizable operations and number ranges, Practice, Single Player, and Two Player modes, Supports addition, subtraction, multiplication, division, times tables, and square numbers, Ad-free and subscription-free experience, Adjustable difficulty and color themes, Suitable for kids, students, and adults

**In-app purchases:** none


## Frequently asked questions

### Is Grammatik Duell free?

Grammatik Duell costs $0.99, with no in-app purchases.

### Is Math Experts free?

Math Experts costs $4.99, with no in-app purchases.

### Do Grammatik Duell or Math Experts have ads?

Neither Grammatik Duell nor Math Experts shows ads.

### Which is updated more often, Grammatik Duell or Math Experts?

Grammatik Duell ships an update every 2 months, and Math Experts every 6 weeks. Most recently, Grammatik Duell was updated on September 21, 2026 and Math Experts on October 12, 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.*