# Stack Knife vs Bubble Shooter

The clearest difference is in-app purchases: Bubble Shooter at none against Stack Knife's 1. Stack Knife's advantage is ads (none vs shown) and iOS requirement (11.0 vs 13.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Stack Knife sells 1 one-off in-app purchase. Bubble Shooter asks for nothing beyond the download.

Stack Knife ships an update every 3 weeks, Bubble Shooter fortnightly. The most recent releases landed on October 5, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Stack Knife | Bubble Shooter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Size | 303 MB | 181 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Wavelet Lab Inc.](https://appshunter.io/developer/1072996241) | [Liudmyla Petryshyn](https://appshunter.io/developer/1024436268) |

## What reviewers say

### Stack Knife

[App page](https://appshunter.io/ios/app/stack-knife/id1453240354)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### Bubble Shooter

[App page](https://appshunter.io/ios/app/bubble-shooter-relaxing-pop/id6740208429)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Stack Knife free?

Stack Knife is free to download, with in-app purchases available.

### Is Bubble Shooter free?

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

### Do Stack Knife or Bubble Shooter have ads?

Bubble Shooter shows ads; Stack Knife does not.

### Which is updated more often, Stack Knife or Bubble Shooter?

Stack Knife ships an update every 3 weeks, and Bubble Shooter fortnightly. Most recently, Stack Knife was updated on October 5, 2026 and Bubble Shooter on October 16, 2026.

---

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