# Robot Defender vs Project Clean Earth

The clearest difference is ads: Robot Defender at none against Project Clean Earth's shown. Robot Defender also leads on iOS requirement (9.0 vs 15.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Robot Defender sells 1 one-off in-app purchase and Project Clean Earth sells 14 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 17, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Robot Defender | Project Clean Earth |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (1.9K ratings)](https://appshunter.io/ios/app/project-clean-earth/id1604696394/reviews)** |
| Number of ratings | — | **1.9K** |
| Positive reviews | — | 47.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 28 MB | 418 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 12+ |
| Developer | [Aimer Shine Co. Ltd](https://appshunter.io/developer/1032169915) | [1N1](https://appshunter.io/developer/1282816708) |

## What reviewers say

### Robot Defender

[App page](https://appshunter.io/ios/app/robot-defender/id1293129144)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All weapon and special sets. | $0.99 | one-time |


### Project Clean Earth

[App page](https://appshunter.io/ios/app/project-clean-earth/id1604696394)

Embark on a survival adventure in a retro pixel world. Cleanse a radiation-contaminated Earth of mutant creepers using "Bernard," mankind's last weapon. Enhance your abilities with a variety of weapons, drones, and artifacts to complete the Earth Clean Project.

**Highlights:** Retro pixel graphic apocalypse world, Sci-fi story and survival action, Strengthen character with weapons, drones, artifacts, Strategic weapon and drone combinations, Random artifacts and events for replayability, Discover mutant monster attack patterns, New stages and modes as you grow stronger

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

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Welcome Package | $2.99 | one-time |
| Monthly Premium | $3.99 | one-time |
| Intermediate Pack | $4.99 | one-time |
| Guerrilla Special Price | $4.99 | one-time |
| Ad-Free Package | $5.99 | one-time |
| Advanced Pack | $6.99 | one-time |
| Gun Package | $6.99 | one-time |
| Turret Package | $6.99 | one-time |
| Buff Package | $6.99 | one-time |
| Growth Fund Pack | $8.99 | one-time |
| Growth Fund Pack 2 | $8.99 | one-time |
| Minerals Pack | $10.99 | one-time |
| Mineral Pack2 | $12.99 | one-time |
| VIP Package | $12.99 | one-time |

**What reviewers like**

- 🎮 Fun gameplay
- 👍 Addictive and enjoyable
- 🚀 Smooth performance
- 🎨 Great visuals and art style

**What reviewers complain about**

- 🐛 In-app purchases not working
- 🔒 Lack of account sync between devices
- 🤯 Difficulty spike at later levels
- 🕰️ Excessive grinding required for progress

**Reported bugs**

- Purchased items not being delivered
- Crashes and freezes on certain devices
- Incorrect pricing and charges for in-app purchases

**Requested features**

- Multiplayer co-op mode
- More character customization options
- Improved balance and difficulty scaling
- Ability to quickly use stamina on beaten levels


## Frequently asked questions

### Is Robot Defender free?

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

### Is Project Clean Earth free?

Project Clean Earth is free to download, with in-app purchases available.

### Do Robot Defender or Project Clean Earth have ads?

Project Clean Earth shows ads; Robot Defender does not.

### Which is updated more often, Robot Defender or Project Clean Earth?

Robot Defender ships an update every 3 weeks, and Project Clean Earth every 3 weeks. Most recently, Robot Defender was updated on October 17, 2026 and Project Clean Earth on October 22, 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.*