# Alien Robot Defender Free vs Crazy Dunk

The clearest difference is in-app purchases: Alien Robot Defender Free at none against Crazy Dunk's 1. Alien Robot Defender Free also leads on ads (none vs shown) and iOS requirement (6.0 vs 15.0). Crazy Dunk's advantage is update cadence (every 12 months vs every 50 months). On price and device support there is nothing between them.

Both are free to download. Crazy Dunk sells 1 one-off in-app purchase. Alien Robot Defender Free asks for nothing beyond the download.

Alien Robot Defender Free ships an update every 50 months, Crazy Dunk every 12 months. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Alien Robot Defender Free | Crazy Dunk |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/alien-robot-defender-free/id548626813/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 50 months | **Every 12 months** |
| Monetization | Free | — |
| Size | 13 MB | 99 MB |
| Requires iOS | **6.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mike Hempfling](https://appshunter.io/developer/422781074) | [Dhaval Patel](https://appshunter.io/developer/1629400393) |

## What reviewers say

### Alien Robot Defender Free

[App page](https://appshunter.io/ios/app/alien-robot-defender-free/id548626813)

Engage in a classic side-scrolling shooter, defending against waves of alien robots. Strategically shoot invaders to unlock new levels and achieve high scores. Different robot behaviors add to the challenge.

**Highlights:** Classic side-scrolling gameplay, Battle alien robots, Unlock new levels, High score challenges, Master 40 levels, Sharp shooter bonus

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

**In-app purchases:** none


### Crazy Dunk

[App page](https://appshunter.io/ios/app/crazy-dunk-gravity-groove/id6475390168)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad Free Version | $7.99 | one-time |


## Frequently asked questions

### Is Alien Robot Defender Free free?

Alien Robot Defender Free is free to download, with no in-app purchases.

### Is Crazy Dunk free?

Crazy Dunk is free to download, with in-app purchases available.

### Do Alien Robot Defender Free or Crazy Dunk have ads?

Crazy Dunk shows ads; Alien Robot Defender Free does not.

### Which is updated more often, Alien Robot Defender Free or Crazy Dunk?

Alien Robot Defender Free ships an update every 50 months, and Crazy Dunk every 12 months. Most recently, Alien Robot Defender Free was updated on November 1, 2026 and Crazy Dunk on November 4, 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.*