# Knock Balls! vs Gaboon Viper

The clearest difference is in-app purchases: Gaboon Viper at none against Knock Balls!'s 1. Gaboon Viper also leads on ads (none vs shown) and update cadence (every 2 days vs every 3 months). Knock Balls!'s advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price there is nothing between them.

Both are free to download. Knock Balls! sells 1 one-off in-app purchase. Gaboon Viper asks for nothing beyond the download.

Knock Balls! ships an update every 3 months, Gaboon Viper every 2 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Knock Balls! | Gaboon Viper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (211K ratings)](https://appshunter.io/ios/app/knock-balls/id1424257445/reviews)** | — |
| Number of ratings | **211K** | — |
| Positive reviews | 45.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 286 MB | 6 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 9+ | 12+ |
| Developer | [Voodoo](https://appshunter.io/developer/714804730) | [Tsung Ying Tu](https://appshunter.io/developer/6800212292) |

## What reviewers say

### Knock Balls!

[App page](https://appshunter.io/ios/app/knock-balls/id1424257445)

Test your aim by throwing balls to demolish various structures. Enjoy hundreds of levels with diverse visuals and challenging gameplay. Simple one-tap controls make it easy to pick up and play.

**Highlights:** Throw balls to crush structures, Hundreds of levels, Diverse visual ambiances, One-tap controls, Addictive gameplay

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $3.99 | one-time |

**What reviewers like**

- 🚀 Addictive and fun
- 👍 Satisfying physics and gameplay
- 🎨 Visually appealing graphics

**What reviewers complain about**

- 💢 Excessive ads
- 🔁 Repetitive levels and block formations
- 🔇 Lack of sound effects

**Reported bugs**

- Game crashes or freezes after ads
- Inconsistent performance on some devices

**Requested features**

- More challenging and varied levels
- Ability to save/carry over unused balls
- Customizable cannons and upgrades


### Gaboon Viper

[App page](https://appshunter.io/ios/app/gaboon-viper/id6812165648)

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

**In-app purchases:** none


## Frequently asked questions

### Is Knock Balls! free?

Knock Balls! is free to download, with in-app purchases available.

### Is Gaboon Viper free?

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

### Do Knock Balls! or Gaboon Viper have ads?

Knock Balls! shows ads; Gaboon Viper does not.

### Which is updated more often, Knock Balls! or Gaboon Viper?

Knock Balls! ships an update every 3 months, and Gaboon Viper every 2 days. Most recently, Knock Balls! was updated on October 25, 2026 and Gaboon Viper on October 24, 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.*