# The Big Duel vs Math Decoder

The clearest difference is price: The Big Duel at Free against Math Decoder's $0.99. The Big Duel also leads on update cadence (every 12 months vs every 36 months) and device support (3 vs 1). Math Decoder's advantage is in-app purchases (none vs 1). On ads and iOS requirement there is nothing between them.

The Big Duel is free to download; Math Decoder costs $0.99 up front. The Big Duel sells 1 one-off in-app purchase. Math Decoder asks for nothing beyond the download.

The Big Duel ships an update every 12 months, Math Decoder every 36 months. The most recent releases landed on June 24, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | The Big Duel | Math Decoder |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/the-big-duel/id987225081/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 12 months** | Every 36 months |
| Monetization | Free with in-app purchases | — |
| Size | 10 MB | 28 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [ilan TETRUASHVILI](https://appshunter.io/developer/940821251) | [Ventura Educational Systems](https://appshunter.io/developer/371324172) |

## What reviewers say

### The Big Duel

[App page](https://appshunter.io/ios/app/the-big-duel/id987225081)

Engage in a fun and addictive game to sharpen your math abilities. Choose from three distinct game modes, including math calculations, size comparisons, and shape recognition. Compete head-to-head with another player on a single device or race against the clock.

**Highlights:** Multiple game modes (Math, Bigger/Smaller, Shapes), Supports addition, subtraction, multiplication, division, 1v1 multiplayer on one device, Play against the clock, Interactive learning with animations, Adjustable difficulty

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ad's | $0.99 | one-time |


### Math Decoder

[App page](https://appshunter.io/ios/app/math-decoder/id1387526040)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is The Big Duel free?

The Big Duel is free to download, with in-app purchases available.

### Is Math Decoder free?

Math Decoder costs $0.99, with no in-app purchases.

### Do The Big Duel or Math Decoder have ads?

Neither The Big Duel nor Math Decoder shows ads.

### Which is updated more often, The Big Duel or Math Decoder?

The Big Duel ships an update every 12 months, and Math Decoder every 36 months. Most recently, The Big Duel was updated on June 24, 2026 and Math Decoder on September 20, 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.*