# Sky Invaders vs Universe Invader 2

The clearest difference is review sentiment: Universe Invader 2 at 94% against Sky Invaders's 50%. Universe Invader 2 also leads on rating (4.8 vs 1.0) and update cadence (every 5 weeks vs every 23 months). Sky Invaders's advantage is in-app purchases (none vs 10) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Universe Invader 2 sells 10 one-off in-app purchases. Sky Invaders asks for nothing beyond the download.

Universe Invader 2 holds the better App Store score, 4.8 against 1.0. That said, the two scores are not equally well evidenced: Universe Invader 2 has 85 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of Sky Invaders's written reviews are positive against 94% of Universe Invader 2's.

Sky Invaders ships an update every 23 months, Universe Invader 2 every 5 weeks. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Sky Invaders | Universe Invader 2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/sky-invaders/id566963150/reviews) | **[4.8 (85 ratings)](https://appshunter.io/ios/app/universe-invader-2-alien-war/id6739988487/reviews)** |
| Number of ratings | 1 | **85** |
| Positive reviews | 50.0% of reviews | **94.1% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 23 months | **Every 5 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 4 MB | 466 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Alphaworks](https://appshunter.io/developer/566963153) | [Gcenter](https://appshunter.io/developer/1473786034) |

## What reviewers say

### Sky Invaders

[App page](https://appshunter.io/ios/app/sky-invaders/id566963150)

Defend Earth from relentless alien invaders as the last Sky Fighter. Obliterate waves of increasingly formidable enemies, strategize your limited firepower, and climb the leaderboard in this fast-paced, retro-style arcade game.

**Highlights:** Defend Earth from alien invaders, Increasingly challenging enemy waves, Limited firepower strategy, Climb the leaderboard, Fast-paced gameplay, Retro visuals

**In-app purchases:** none


### Universe Invader 2

[App page](https://appshunter.io/ios/app/universe-invader-2-alien-war/id6739988487)

Embark on an epic space adventure to defend the galaxy from an alien invasion. This arcade shooter combines classic gameplay with stunning modern graphics, intense battles, and challenging boss fights. Collect power-ups and unlock achievements as you fight to save the universe.

**Highlights:** Stunning galaxy graphics, Intense alien battles, Epic boss fights, Collect power-ups and bonuses, Unlock achievements and rewards

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lucky Clover's Offer 1 | $0.99 | one-time |
| Bundle Vip 2 | $0.99 | one-time |
| Bundle Vip 1 | $0.99 | one-time |
| Starter Pack | $0.99 | one-time |
| Instant Rank Up 2 | $1.99 | one-time |
| Ruby Offer 1 | $1.99 | one-time |
| Ruby Offer 2 | $4.49 | one-time |
| Gold 3 | $4.99 | one-time |
| Combo Ruby And Gold | $4.99 | one-time |
| Ruby Offer 3 | $5.99 | one-time |


## Frequently asked questions

### Is Sky Invaders free?

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

### Is Universe Invader 2 free?

Universe Invader 2 is free to download, with in-app purchases available.

### Which has better reviews, Sky Invaders or Universe Invader 2?

Universe Invader 2 is rated higher. Sky Invaders averages 1.0 out of 5 from 1 ratings, while Universe Invader 2 averages 4.8 from 85 ratings.

### Do Sky Invaders or Universe Invader 2 have ads?

Universe Invader 2 shows ads; Sky Invaders does not.

### Which is updated more often, Sky Invaders or Universe Invader 2?

Sky Invaders ships an update every 23 months, and Universe Invader 2 every 5 weeks. Most recently, Sky Invaders was updated on November 1, 2026 and Universe Invader 2 on October 30, 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.*