# Sky Invasion vs Stellar Stack Puzzle

Sky Invasion and Stellar Stack Puzzle are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Sky Invasion sells 10 one-off in-app purchases and Stellar Stack Puzzle sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Sky Invasion | Stellar Stack Puzzle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/sky-invasion-reboot/id6476250384/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Size | 281 MB | 124 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [U8Space Sdn. Bhd.](https://appshunter.io/developer/1482236420) | [Areeb Zahid](https://appshunter.io/developer/1715377928) |

## What reviewers say

### Sky Invasion

[App page](https://appshunter.io/ios/app/sky-invasion-reboot/id6476250384)

Pilot a variety of aircraft, each with unique upgrades and weapons, to defend Earth from monstrous enemy planes. Engage in epic boss battles, collect and upgrade your fleet, and compete for the top spot on the leaderboard in this classic shoot-em-up.

**Highlights:** Dozens of aircraft with unique upgrades, Variety of weapons and ultimate moves, Epic boss battles, Unlock and upgrade planes, Leaderboard challenges, Classic shoot-em-up gameplay

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mini Pack | $0.99 | one-time |
| Booster Bundle | $0.99 | one-time |
| Small Pack | $1.99 | one-time |
| Weekly Bundle | $2.99 | one-time |
| Big Pack | $3.99 | one-time |
| Bronze Pack | $5.99 | one-time |
| Silver Pack | $8.99 | one-time |
| Gold Pack | $12.99 | one-time |
| Crystal Pack | $19.99 | one-time |
| Diamond Pack | $29.99 | one-time |


### Stellar Stack Puzzle

[App page](https://appshunter.io/ios/app/stellar-stack-puzzle/id6599849625)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 2K Coins | $1.99 | one-time |
| 4K Coins | $3.99 | one-time |
| 8K Coins | $4.99 | one-time |
| 12K Coins | $8.99 | one-time |
| 20K Coins | $12.99 | one-time |
| 35K Coins | $14.99 | one-time |


## Frequently asked questions

### Is Sky Invasion free?

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

### Is Stellar Stack Puzzle free?

Stellar Stack Puzzle is free to download, with in-app purchases available.

### Do Sky Invasion or Stellar Stack Puzzle have ads?

Both Sky Invasion and Stellar Stack Puzzle show ads.

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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.*