# Fire Knife 3D vs Vacuum Defense

The clearest difference is rating: Fire Knife 3D at 5.0 against Vacuum Defense's 4.0. Fire Knife 3D also leads on ads (none vs shown) and monetization model (free vs ad-supported). Vacuum Defense's advantage is update cadence (every 2 days vs every 4 days). On price, ratings volume, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Fire Knife 3D holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Fire Knife 3D ships an update every 4 days, Vacuum Defense every 2 days. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Fire Knife 3D | Vacuum Defense |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fire-knife-3d/id1453839400/reviews)** | [4.0 (2 ratings)](https://appshunter.io/ios/app/vacuum-defense/id6739926326/reviews) |
| Number of ratings | 1 | **2** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 days | **Every 2 days** |
| Monetization | **Free** | Ad-supported |
| Size | 71 MB | 131 MB |
| Requires iOS | **8.1** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AA2G1 LTD](https://appshunter.io/developer/1435150054) | [Adilkhan Kokanov](https://appshunter.io/developer/1780522995) |

## What reviewers say

### Fire Knife 3D

[App page](https://appshunter.io/ios/app/fire-knife-3d/id1453839400)

Test your dexterity by throwing knives at targets, avoiding other blades. Break log towers, defeat bosses, and complete hundreds of levels. Earn coins to unlock a collection of cool knives and show off your skills.

**Highlights:** Knife throwing mechanics, Log tower breaking, Boss fights, Hundreds of levels, Coin collection, Unlockable knives

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

**In-app purchases:** none


### Vacuum Defense

[App page](https://appshunter.io/ios/app/vacuum-defense/id6739926326)

Control a powerful pipe to collect ammunition and defend your base from waves of attacking enemies. Strategically choose and upgrade abilities to counter different foes and overcome challenging boss battles. Enjoy vibrant visuals and dynamic gameplay in this thrilling arcade experience.

**Highlights:** Dynamic pipe control gameplay, Collect balls for ammo, Strategic skill selection and upgrades, Epic boss battles, Vibrant visuals and animations

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Fire Knife 3D free?

Fire Knife 3D is free to download, with no in-app purchases.

### Is Vacuum Defense free?

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

### Which has better reviews, Fire Knife 3D or Vacuum Defense?

Fire Knife 3D is rated higher. Fire Knife 3D averages 5.0 out of 5 from 1 ratings, while Vacuum Defense averages 4.0 from 2 ratings.

### Do Fire Knife 3D or Vacuum Defense have ads?

Vacuum Defense shows ads; Fire Knife 3D does not.

### Which is updated more often, Fire Knife 3D or Vacuum Defense?

Fire Knife 3D ships an update every 4 days, and Vacuum Defense every 2 days. Most recently, Fire Knife 3D was updated on November 2, 2026 and Vacuum Defense on November 4, 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.*