# Under Up vs Alien Attack

The clearest difference is rating: Under Up at 5.0 against Alien Attack's 3.8. Under Up also leads on review sentiment (100% vs 67%) and iOS requirement (13.0 vs 15.0). Alien Attack's advantage is in-app purchases (none vs 3) and update cadence (daily vs every 3 days). On price, ads and device support there is nothing between them.

Both are free to download. Under Up sells 3 one-off in-app purchases. Alien Attack asks for nothing beyond the download.

Under Up holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Alien Attack has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Under Up's written reviews are positive against 67% of Alien Attack's.

Under Up ships an update every 3 days, Alien Attack daily. The most recent releases landed on October 2, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Under Up | Alien Attack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/under-up/id6755349542/reviews)** | [3.8 (5 ratings)](https://appshunter.io/ios/app/alien-attack-rpg-idle-action/id6778897821/reviews) |
| Number of ratings | 1 | **5** |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 3 days | **Daily** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 114 MB | 180 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Evocentron LLC](https://appshunter.io/developer/1820074067) | [HAPPY GAME COMPANY TEKNOLOJI ANONIM SIRKETI](https://appshunter.io/developer/1523367113) |

## What reviewers say

### Under Up

[App page](https://appshunter.io/ios/app/under-up/id6755349542)

A physics-based climbing game where players tap to ascend through challenging levels filled with unpredictable obstacles. Survive each stage by avoiding hazards and reaching the top without losing all your hearts. Enjoy colorful visuals and addictive gameplay.

**Highlights:** Physics-based gameplay, Dozens of unique obstacles, Increasing difficulty, Simple tap controls, Colorful visuals, Addictive challenge

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Spooki Character Unlock | $1.99 | one-time |
| Windy Character Unlock | $1.99 | one-time |
| Heli Character Unlock | $1.99 | one-time |


### Alien Attack

[App page](https://appshunter.io/ios/app/alien-attack-rpg-idle-action/id6778897821)

Control a rapidly evolving alien lifeform and conquer Earth. Consume humans to grow stronger, unlock new mutations, and dominate every battlefield. Upgrade your abilities and spread your alien domination across the planet.

**Highlights:** Evolve alien lifeform, Consume humans for energy, Unlock new mutations and powers, Action-packed battles, Upgrade abilities, Conquer world locations

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

**In-app purchases:** none


## Frequently asked questions

### Is Under Up free?

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

### Is Alien Attack free?

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

### Which has better reviews, Under Up or Alien Attack?

Under Up is rated higher. Under Up averages 5.0 out of 5 from 1 ratings, while Alien Attack averages 3.8 from 5 ratings.

### Do Under Up or Alien Attack have ads?

Both Under Up and Alien Attack show ads.

### Which is updated more often, Under Up or Alien Attack?

Under Up ships an update every 3 days, and Alien Attack daily. Most recently, Under Up was updated on October 2, 2026 and Alien Attack on October 23, 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.*