# Sky Defense vs VIMO

The clearest difference is in-app purchases: VIMO at none against Sky Defense's 32. VIMO also leads on ads (none vs shown) and update cadence (monthly vs every 2 months). Sky Defense's advantage is iOS requirement (13.0 vs 17.6). On price and device support there is nothing between them.

Both are free to download. Sky Defense sells 32 one-off in-app purchases. VIMO asks for nothing beyond the download.

Sky Defense ships an update every 2 months, VIMO monthly. The most recent releases landed on October 28, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Sky Defense | VIMO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (11K ratings)](https://appshunter.io/ios/app/sky-defense-war-duty/id6469495100/reviews)** | — |
| Number of ratings | **11K** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 313 MB | 73 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Horus](https://appshunter.io/developer/1296722699) | [Nettz](https://appshunter.io/developer/1743324751) |

## What reviewers say

### Sky Defense

[App page](https://appshunter.io/ios/app/sky-defense-war-duty/id6469495100)

Defend your airspace in an intense arcade shooter against an alien invasion. Engage in fast-paced, vertical ground-to-air combat with realistic visuals and a thrilling story. Perfect for quick bursts of action.

**Highlights:** Fast-paced arcade shooting, Unique vertical gameplay, Thrilling story mode, Realistic visuals and sound, Pick-up-and-play accessibility

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

**In-app purchases (32)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads End Game | $1.99 | one-time |
| Twin M2 Browning Sale 50% | $1.99 | one-time |
| Small Starter Pack | $1.99 | one-time |
| Pocket of Gold | $2.99 | one-time |
| 9K111 Fagot Sale 30% | $2.99 | one-time |
| Twin M2 Browning Sale 30% | $2.99 | one-time |
| Pocket of Gold First Purchase | $2.99 | one-time |
| Extra Pack | $4.99 | one-time |
| Bag of Gold | $4.99 | one-time |
| Twin Type 92 Sale 50% | $4.99 | one-time |
| Unique Handful of Gold | $4.99 | one-time |
| Twin M2 Browning | $4.99 | one-time |
| Medium Starter Pack | $4.99 | one-time |
| Handful of Gold First Purchase | $4.99 | one-time |
| Twin Type 92 Sale 30% | $6.99 | one-time |
| Extra Starter Pack | $6.99 | one-time |
| Twin Type 92 | $9.99 | one-time |
| Twin M.A 306 Sale 50% | $9.99 | one-time |
| PILE OF CASH | $9.99 | one-time |
| Package 7 Days | $9.99 | one-time |
| Pile of Gold | $9.99 | one-time |
| Pile of Gold First Purchase | $9.99 | one-time |
| Special Pack Sale 20% | $18.99 | one-time |
| BAG OF CASH | $19.99 | one-time |
| Bag of Gold | $19.99 | one-time |
| Bag of Gold Bonus 800 Gold | $19.99 | one-time |
| Twin MG42 BBQ | $19.99 | one-time |
| Bag of Gold First Purchase | $19.99 | one-time |
| Special Pack | $23.99 | one-time |
| Twin Sentry Chaingun | $24.99 | one-time |
| Case of Gold | $29.99 | one-time |
| CASE OF CASH | $29.99 | one-time |

**What reviewers like**

- 🚀 Great game
- 👍 Fun and challenging
- 👍 Realistic
- 👍 No ads option

**What reviewers complain about**

- 🐛 Sound issues
- 💰 Expensive in-app purchases
- 🔋 Ad-heavy gameplay
- 🔒 Political ads

**Reported bugs**

- Unable to summon airstrike
- Game only supported to level 180

**Requested features**

- New updates and levels
- Translator for chat


### VIMO

[App page](https://appshunter.io/ios/app/vimo/id6499387628)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sky Defense free?

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

### Is VIMO free?

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

### Do Sky Defense or VIMO have ads?

Sky Defense shows ads; VIMO does not.

### Which is updated more often, Sky Defense or VIMO?

Sky Defense ships an update every 2 months, and VIMO monthly. Most recently, Sky Defense was updated on October 28, 2026 and VIMO on October 5, 2026.

---

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