# Stack Attack!! vs Bullet Fusion

The clearest difference is rating: Stack Attack!! at 4.3 against Bullet Fusion's 1.6. Stack Attack!! also leads on ratings volume (403 vs 5). Bullet Fusion's advantage is update cadence (every 4 days vs every 2 weeks). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Stack Attack!! sells 19 one-off in-app purchases and Bullet Fusion sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Stack Attack!! holds the better App Store score, 4.3 against 1.6. That said, the two scores are not equally well evidenced: Stack Attack!! has 403 ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 23% of Stack Attack!!'s written reviews are positive against 29% of Bullet Fusion's, so the app with the better star average is not the one people write more warmly about.

Stack Attack!! ships an update every 2 weeks, Bullet Fusion every 4 days. The most recent releases landed on August 19, 2026 and July 7, 2026 respectively.

## The numbers

| Metric | Stack Attack!! | Bullet Fusion |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (403 ratings)](https://appshunter.io/ios/app/stack-attack/id6566190313/reviews)** | [1.6 (5 ratings)](https://appshunter.io/ios/app/bullet-fusion/id6739496508/reviews) |
| Number of ratings | **403** | 5 |
| Positive reviews | 23.2% of reviews | **28.6% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 247 MB | 278 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 9+ |
| Developer | [Voodoo](https://appshunter.io/developer/714804730) | [Yso Corp](https://appshunter.io/developer/659815325) |

## What reviewers say

### Stack Attack!!

[App page](https://appshunter.io/ios/app/stack-attack/id6566190313)

Engage in intense battles against waves of enemies, strategically demolishing their formations with powerful weapons. Upgrade your capabilities by selecting the best skills to protect the cube world from a malevolent hex invasion.

**Highlights:** Defeat enemy waves, Demolish enemy stacks, Upgrade skills, Save the cube world, Space invader gameplay

**Features:** macOS Compatibility

**In-app purchases (19)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gem Pack Small | $0.99 | one-time |
| Gold Pack Small | $0.99 | one-time |
| Starter Pack | $2.99 | one-time |
| No Ads | $2.99 | one-time |
| Gem Pack Medium | $4.99 | one-time |
| 2X Speed! | $4.99 | one-time |
| Gold Pack Medium | $4.99 | one-time |
| Skip'its Medium Pack | $5.99 | one-time |
| Gem Pack Large | $9.99 | one-time |
| Gold Pack Large | $9.99 | one-time |
| Premium Pass | $14.99 | one-time |
| Gem Pack XL | $19.99 | one-time |
| Skip'its Large Pack | $19.99 | one-time |
| Gold Pack XL | $19.99 | one-time |
| Diamond Hero | $29.99 | one-time |
| Gem Pack XXL | $49.99 | one-time |
| Gold Pack XXL | $49.99 | one-time |
| Gem Pack XXXL | $99.99 | one-time |
| Gold Pack XXXL | $99.99 | one-time |

**What reviewers like**

- 👍 Simple and fun gameplay
- 🚀 No ads or microtransactions
- 💡 Nice armor upgrade system

**What reviewers complain about**

- 🐛 Glitches and bugs, especially after updates
- 🐛 Progress and upgrades getting reset or lost
- 🐛 Levels becoming unplayable after a certain point

**Reported bugs**

- Enemies' health scaling with player's attack power
- Levels freezing or getting stuck at checkpoints
- Weapon and upgrade levels getting downgraded randomly

**Requested features**

- Mute sound effects option
- Better communication from developers about updates
- More content and stages to progress through


### Bullet Fusion

[App page](https://appshunter.io/ios/app/bullet-fusion/id6739496508)

Collect and merge bullets to enhance your firepower and engage in intense combat. Maneuver strategically to maximize your attack capabilities and defeat numerous enemies with a gatling-style weapon.

**Highlights:** Collect and merge bullets, Increase firepower, Strategic maneuvering, Gatling-style weapon combat, Fight multiple enemies

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Stack Attack!! free?

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

### Is Bullet Fusion free?

Bullet Fusion is free to download, with in-app purchases available.

### Which has better reviews, Stack Attack!! or Bullet Fusion?

Stack Attack!! is rated higher. Stack Attack!! averages 4.3 out of 5 from 403 ratings, while Bullet Fusion averages 1.6 from 5 ratings.

### Do Stack Attack!! or Bullet Fusion have ads?

Both Stack Attack!! and Bullet Fusion show ads.

### Which is updated more often, Stack Attack!! or Bullet Fusion?

Stack Attack!! ships an update every 2 weeks, and Bullet Fusion every 4 days. Most recently, Stack Attack!! was updated on August 19, 2026 and Bullet Fusion on July 7, 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.*