# RobotVSAlien vs RE

The clearest difference is in-app purchases: RE at none against RobotVSAlien's 1. RobotVSAlien's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 2 months). On price and device support there is nothing between them.

Both are free to download. RobotVSAlien sells 1 one-off in-app purchase. RE asks for nothing beyond the download.

RobotVSAlien ships an update every 2 weeks, RE every 2 months. The most recent releases landed on October 4, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | RobotVSAlien | RE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/robotvsalien/id863067072/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 55 MB | 44 MB |
| Requires iOS | **7.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Akihiro Fujiwara](https://appshunter.io/developer/721031264) | [Daisuke Shinzato](https://appshunter.io/developer/1329176830) |

## 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 |


### RE

[App page](https://appshunter.io/ios/app/reantcity/id6742393677)

**In-app purchases:** none


## Frequently asked questions

### Is RobotVSAlien free?

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

### Is RE free?

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

### Do RobotVSAlien or RE have ads?

RE shows ads; RobotVSAlien does not.

### Which is updated more often, RobotVSAlien or RE?

RobotVSAlien ships an update every 2 weeks, and RE every 2 months. Most recently, RobotVSAlien was updated on October 4, 2026 and RE 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.*