# RobotVSAlien vs Merge Robots Universe

The clearest difference is rating: Merge Robots Universe at 5.0 against RobotVSAlien's 4.0. Merge Robots Universe also leads on update cadence (every 4 days vs every 2 weeks) and ratings volume (6 vs 1). RobotVSAlien's advantage is iOS requirement (7.0 vs 13.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. RobotVSAlien sells 1 one-off in-app purchase and Merge Robots Universe sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Merge Robots Universe holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Merge Robots Universe has 6 ratings behind it against 1, so its average is the more settled of the two.

RobotVSAlien ships an update every 2 weeks, Merge Robots Universe every 4 days. The most recent releases landed on October 21, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | RobotVSAlien | Merge Robots Universe |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/robotvsalien/id863067072/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/merge-robots-universe/id6469772094/reviews)** |
| Number of ratings | 1 | **6** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 55 MB | 114 MB |
| Requires iOS | **7.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Akihiro Fujiwara](https://appshunter.io/developer/721031264) | [Playshore, S.L.](https://appshunter.io/developer/681055406) |

## What reviewers say

### RobotVSAlien

[App page](https://appshunter.io/ios/app/robotvsalien/id863067072)

Defend against alien invaders using a growing army of robots. This casual defense game allows players to upgrade and promote their units to increase their strength. Design your own giant robot and repel the alien threat.

**Highlights:** Casual defense gameplay, Unit promotion and upgrading, Design giant robots, Repel alien invaders, Unique robot and alien designs

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads and Privilege granting | $0.99 | one-time |


### Merge Robots Universe

[App page](https://appshunter.io/ios/app/merge-robots-universe/id6469772094)

Build a powerful robot tycoon empire by merging and upgrading robots. Explore planets, unlock new factories, and collect unique robots that transform into various vehicles. Earn coins and gems through daily quests and achievements to become the richest manager in the galaxy.

**Highlights:** Merge and upgrade robots, Explore unique planets and factories, Collect transforming robots, Earn coins and gems, Complete daily quests and achievements, Offline play supported

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Powers 1 | $0.99 | one-time |
| Fuel 1 | $0.99 | one-time |
| Fuel 2 | $1.99 | one-time |
| Special Pack 1 | $2.99 | one-time |
| Fuel 3 | $2.99 | one-time |
| Powers 3 | $2.99 | one-time |
| Fuel 4 | $3.99 | one-time |
| Powers 5 | $4.99 | one-time |
| Special Pack 2 | $4.99 | one-time |
| Powers 8 | $7.99 | one-time |


## Frequently asked questions

### Is RobotVSAlien free?

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

### Is Merge Robots Universe free?

Merge Robots Universe is free to download, with in-app purchases available.

### Which has better reviews, RobotVSAlien or Merge Robots Universe?

Merge Robots Universe is rated higher. RobotVSAlien averages 4.0 out of 5 from 1 ratings, while Merge Robots Universe averages 5.0 from 6 ratings.

### Do RobotVSAlien or Merge Robots Universe have ads?

Neither RobotVSAlien nor Merge Robots Universe shows ads.

### Which is updated more often, RobotVSAlien or Merge Robots Universe?

RobotVSAlien ships an update every 2 weeks, and Merge Robots Universe every 4 days. Most recently, RobotVSAlien was updated on October 21, 2026 and Merge Robots Universe on October 16, 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.*