# Spelling Test For Kids vs Math Invader

The clearest difference is in-app purchases: Spelling Test For Kids at none against Math Invader's 2. Spelling Test For Kids also leads on update cadence (every 5 months vs every 14 months) and iOS requirement (8.0 vs 16.0). On price, ads and device support there is nothing between them.

Both are free to download. Math Invader sells 2 one-off in-app purchases. Spelling Test For Kids asks for nothing beyond the download.

Spelling Test For Kids ships an update every 5 months, Math Invader every 14 months. The most recent releases landed on October 26, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Spelling Test For Kids | Math Invader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (2 ratings)](https://appshunter.io/ios/app/math-invader/id1539336630/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 14 months |
| Monetization | — | Free with in-app purchases |
| Size | 10 MB | 25 MB |
| Requires iOS | **8.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Prathed Sangwongvanit](https://appshunter.io/developer/999020467) | [Torben Toepper](https://appshunter.io/developer/633701843) |

## What reviewers say

### Spelling Test For Kids

[App page](https://appshunter.io/ios/app/spelling-test-for-kids/id1016291530)

**In-app purchases:** none


### Math Invader

[App page](https://appshunter.io/ios/app/math-invader/id1539336630)

Engage in rapid-fire math challenges set in a space combat environment. Pilot a spaceship, solve arithmetic problems to destroy incoming asteroids, and improve your skills across various modes. Compete globally via leaderboards.

**Highlights:** Fast-paced math action in space, Addition, subtraction, multiplication, division practice, Multiplication tables and advanced multiplication, Customizable training modes, Weekly Mission and Endless Mode, Game Center leaderboards, Customizable spaceships and themes

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Extra Pack | $0.99 | one-time |
| Spaceship Pack | $1.99 | one-time |


## Frequently asked questions

### Is Spelling Test For Kids free?

Spelling Test For Kids is free to download, with no in-app purchases.

### Is Math Invader free?

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

### Do Spelling Test For Kids or Math Invader have ads?

Neither Spelling Test For Kids nor Math Invader shows ads.

### Which is updated more often, Spelling Test For Kids or Math Invader?

Spelling Test For Kids ships an update every 5 months, and Math Invader every 14 months. Most recently, Spelling Test For Kids was updated on October 26, 2026 and Math Invader on October 29, 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.*