# Drobot vs Project Clean Earth

The clearest difference is review sentiment: Drobot at 100% against Project Clean Earth's 47%. Drobot also leads on in-app purchases (none vs 16) and ads (none vs shown). Project Clean Earth's advantage is rating (4.7 vs 4.3) and ratings volume (1.9K vs 3). On price and device support there is nothing between them.

Both are free to download. Project Clean Earth sells 14 one-off in-app purchases. Drobot asks for nothing beyond the download.

Project Clean Earth holds the better App Store score, 4.7 against 4.3. That said, the two scores are not equally well evidenced: Project Clean Earth has 1.9K ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 100% of Drobot's written reviews are positive against 47% of Project Clean Earth's, so the app with the better star average is not the one people write more warmly about.

Drobot ships an update every 3 months, Project Clean Earth every 3 weeks. The most recent releases landed on June 11, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Drobot | Project Clean Earth |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (3 ratings)](https://appshunter.io/ios/app/drobot/id1453691042/reviews) | **[4.7 (1.9K ratings)](https://appshunter.io/ios/app/project-clean-earth/id1604696394/reviews)** |
| Number of ratings | 3 | **1.9K** |
| Positive reviews | **100.0% of reviews** | 47.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 44 MB | 401 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 12+ |
| Developer | [Masayoshi Teshima](https://appshunter.io/developer/768526731) | [1N1](https://appshunter.io/developer/1282816708) |

## What reviewers say

### Drobot

[App page](https://appshunter.io/ios/app/drobot/id1453691042)

Engage in a 360-degree space shooter where you fire backwards to defeat mysterious creatures. Upgrade your character between waves to become stronger and clear all levels to restore peace. Features include a unique shooting mechanic and a variety of unlockable color palettes.

**Highlights:** Backwards-firing 360-degree shooting, Upgrade system for character strength, Ten-second waves with numerous enemies, Dash ability with energy charge, Unlockable color palettes

**In-app purchases:** none


### 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 Drobot free?

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

### Is Project Clean Earth free?

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

### Which has better reviews, Drobot or Project Clean Earth?

Project Clean Earth is rated higher. Drobot averages 4.3 out of 5 from 3 ratings, while Project Clean Earth averages 4.7 from 1.9K ratings.

### Do Drobot or Project Clean Earth have ads?

Project Clean Earth shows ads; Drobot does not.

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

Drobot ships an update every 3 months, and Project Clean Earth every 3 weeks. Most recently, Drobot was updated on June 11, 2026 and Project Clean Earth on September 24, 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.*