# Lucky Balls vs Knock Knock Master Cat

The clearest difference is price: Lucky Balls at Free against Knock Knock Master Cat's $0.99. Lucky Balls also leads on ads (none vs shown). Knock Knock Master Cat's advantage is update cadence (every 6 weeks vs every 15 months). On in-app purchases, device support and iOS requirement there is nothing between them.

Lucky Balls is free to download; Knock Knock Master Cat costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Lucky Balls ships an update every 15 months, Knock Knock Master Cat every 6 weeks. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Lucky Balls | Knock Knock Master Cat |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 15 months | **Every 6 weeks** |
| Size | 9 MB | 353 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [江 郭](https://appshunter.io/developer/878465404) | [Shanghai Qiku Information Consulting Co., Ltd](https://appshunter.io/developer/1750821152) |

## What reviewers say

### Lucky Balls

[App page](https://appshunter.io/ios/app/lucky-balls-physics/id6476054606)

**Features:** macOS Compatibility

**In-app purchases:** none


### Knock Knock Master Cat

[App page](https://appshunter.io/ios/app/knock-knock-master-cat/id6758368849)

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

**In-app purchases:** none


## Frequently asked questions

### Is Lucky Balls free?

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

### Is Knock Knock Master Cat free?

Knock Knock Master Cat costs $0.99, with no in-app purchases.

### Do Lucky Balls or Knock Knock Master Cat have ads?

Knock Knock Master Cat shows ads; Lucky Balls does not.

### Which is updated more often, Lucky Balls or Knock Knock Master Cat?

Lucky Balls ships an update every 15 months, and Knock Knock Master Cat every 6 weeks. Most recently, Lucky Balls was updated on November 4, 2026 and Knock Knock Master Cat on November 5, 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.*