# Impact 2018 vs Asteroid Defender

The clearest difference is in-app purchases: Impact 2018 at none against Asteroid Defender's 1. Impact 2018 also leads on update cadence (every 3 weeks vs every 2 months). Asteroid Defender's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Asteroid Defender sells 1 one-off in-app purchase. Impact 2018 asks for nothing beyond the download.

Impact 2018 ships an update every 3 weeks, Asteroid Defender every 2 months. The most recent releases landed on October 7, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Impact 2018 | Asteroid Defender |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (26 ratings)](https://appshunter.io/ios/app/impact-2018/id1225688426/reviews)** | — |
| Number of ratings | **26** | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Ad-supported | — |
| Size | 16 MB | 55 MB |
| Requires iOS | 13.4 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Richard Hughes](https://appshunter.io/developer/320954795) | [Reece Barr](https://appshunter.io/developer/1558879229) |

## What reviewers say

### Impact 2018

[App page](https://appshunter.io/ios/app/impact-2018/id1225688426)

Defend Earth from incoming asteroids by tapping them before they impact. Collect power-ups like missiles, lasers, and shields to aid in your mission and prevent global destruction.

**Highlights:** Tap to destroy asteroids, Collect power-ups, Missile power-up, Laser power-up, Shield power-up, Prevent Earth's destruction

**In-app purchases:** none


### Asteroid Defender

[App page](https://appshunter.io/ios/app/asteroid-defender/id6463864588)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is Impact 2018 free?

Impact 2018 is free to download, with no in-app purchases.

### Is Asteroid Defender free?

Asteroid Defender is free to download, with in-app purchases available.

### Do Impact 2018 or Asteroid Defender have ads?

Impact 2018 shows ads; Asteroid Defender does not.

### Which is updated more often, Impact 2018 or Asteroid Defender?

Impact 2018 ships an update every 3 weeks, and Asteroid Defender every 2 months. Most recently, Impact 2018 was updated on October 7, 2026 and Asteroid Defender on October 14, 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.*