# Operation vs Sky Raid

The clearest difference is in-app purchases: Operation at none against Sky Raid's 5. Operation also leads on update cadence (daily vs every 4 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Sky Raid sells 5 one-off in-app purchases. Operation asks for nothing beyond the download.

Operation ships an update daily, Sky Raid every 4 days. The most recent releases landed on October 16, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Operation | Sky Raid |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 4 days |
| Monetization | Free | — |
| Size | 12 MB | 47 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Boris Kravchenko](https://appshunter.io/developer/1700260082) | [Ana Paula Correa Deboni](https://appshunter.io/developer/1846659127) |

## What reviewers say

### Operation

[App page](https://appshunter.io/ios/app/operation-invaders-from-space/id6738130147)

Pilot a spaceship to defend Earth from an alien invasion. Dodge enemy ships, collect star dust for points, and use onboard weapons to defeat the xenomorphs and save humanity.

**Highlights:** Spaceship combat, Alien invasion defense, Dodge enemy ships, Collect star dust, Use onboard weapons

**Features:** macOS Compatibility

**In-app purchases:** none


### Sky Raid

[App page](https://appshunter.io/ios/app/sky-raid/id6761951284)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cadet Credit Pack | $0.99 | one-time |
| Pilot Credit Pack | $2.99 | one-time |
| Ace Credit Pack | $6.99 | one-time |
| Commander Credit Pack | $14.99 | one-time |
| Unlock All Cosmetics | $19.99 | one-time |


## Frequently asked questions

### Is Operation free?

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

### Is Sky Raid free?

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

### Do Operation or Sky Raid have ads?

Neither Operation nor Sky Raid shows ads.

### Which is updated more often, Operation or Sky Raid?

Operation ships an update daily, and Sky Raid every 4 days. Most recently, Operation was updated on October 16, 2026 and Sky Raid on October 14, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*