# Math Command vs DeltaChess

The clearest difference is price: Math Command at Free against DeltaChess's $0.99. DeltaChess's advantage is ads (none vs shown) and update cadence (every 4 days vs every 2 weeks). On in-app purchases, device support and iOS requirement there is nothing between them.

Math Command is free to download; DeltaChess costs $0.99 up front. Math Command sells 1 one-off in-app purchase and DeltaChess sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Math Command ships an update every 2 weeks, DeltaChess every 4 days. The most recent releases landed on October 1, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Math Command | DeltaChess |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/math-command-earth-defense/id1486223943/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Monetization | Ad-supported | — |
| Size | 133 MB | 156 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +17 | 4+ |
| Developer | [Leonardo Amora](https://appshunter.io/developer/690988469) | [Sezgin Serin](https://appshunter.io/developer/1793997554) |

## What reviewers say

### Math Command

[App page](https://appshunter.io/ios/app/math-command-earth-defense/id1486223943)

Engage in a thrilling math-based action game where you solve arithmetic problems to defend Earth from destruction. Face challenging levels, bosses, and traps that test your logic and speed. Utilize voice commands or keyboard input to input answers and save the planet.

**Highlights:** Solve math problems (add, subtract, multiply, divide), Voice recognition for input, Keyboard support, Video rewards for extra solutions, Save and continue progress, 10 challenging levels, 11 powerful bosses

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $1.99 | one-time |


### DeltaChess

[App page](https://appshunter.io/ios/app/deltachess/id6753863395)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Developer Tip – Small | $0.99 | one-time |
| Developer Tip – Medium | $9.99 | one-time |
| Developer Tip – Large | $99.99 | one-time |


## Frequently asked questions

### Is Math Command free?

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

### Is DeltaChess free?

DeltaChess costs $0.99, and also offers in-app purchases.

### Do Math Command or DeltaChess have ads?

Math Command shows ads; DeltaChess does not.

### Which is updated more often, Math Command or DeltaChess?

Math Command ships an update every 2 weeks, and DeltaChess every 4 days. Most recently, Math Command was updated on October 1, 2026 and DeltaChess on October 9, 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.*