# Merge Defense Adventure vs Stack Attack!!

The clearest difference is rating: Merge Defense Adventure at 5.0 against Stack Attack!!'s 4.3. Stack Attack!!'s advantage is ratings volume (399 vs 1) and update cadence (every 2 weeks vs every 2 months). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Merge Defense Adventure sells 3 one-off in-app purchases and Stack Attack!! sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Merge Defense Adventure holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Stack Attack!! has 399 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 17% of Merge Defense Adventure's written reviews are positive against 23% of Stack Attack!!'s, so the app with the better star average is not the one people write more warmly about.

Merge Defense Adventure ships an update every 2 months, Stack Attack!! every 2 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Merge Defense Adventure | Stack Attack!! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/merge-defense-adventure/id1571311151/reviews)** | [4.3 (399 ratings)](https://appshunter.io/ios/app/stack-attack/id6566190313/reviews) |
| Number of ratings | 1 | **399** |
| Positive reviews | 17.4% of reviews | **23.2% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 174 MB | 247 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Tatem Games Inc.](https://appshunter.io/developer/1259148330) | [Voodoo](https://appshunter.io/developer/714804730) |

## What reviewers say

### Merge Defense Adventure

[App page](https://appshunter.io/ios/app/merge-defense-adventure/id1571311151)

Engage in a strategic tower defense experience with simple controls and turn-based gameplay. Merge defenders to upgrade their power and survive waves of advancing enemies. This game offers tactical depth for a challenging and engaging time.

**Highlights:** Turn-based gameplay, Merge defenders to upgrade, Strategic placement, Offline play, Power-ups and unlocks

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pack of Gems | $0.99 | one-time |
| Double Gems | $1.99 | one-time |
| Remove Ads | $3.99 | one-time |

**What reviewers like**

- 🚀 Ok game
- 👍 Sjajno
- 👍 Good job
- 👍 Great game
- 👍 Interesting app

**What reviewers complain about**

- 💥 Ads
- 🐛 Freezes too often
- 🐛 Crashes
- 🔋 Laggy
- 💥 Too many ads

**Reported bugs**

- Login screen freezes
- Incompatible with older devices
- Level 37 glitch
- Level 25 bug
- Level 51 and 53 bugs

**Requested features**

- Dark mode option
- Offline play


### 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 (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter Pack | $2.99 | one-time |
| No Ads | $2.99 | one-time |
| 2X Speed! | $4.99 | one-time |
| Skip'its Medium Pack | $5.99 | 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 |

**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


## Frequently asked questions

### Is Merge Defense Adventure free?

Merge Defense Adventure is free to download, with in-app purchases available.

### Is Stack Attack!! free?

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

### Which has better reviews, Merge Defense Adventure or Stack Attack!!?

Merge Defense Adventure is rated higher. Merge Defense Adventure averages 5.0 out of 5 from 1 ratings, while Stack Attack!! averages 4.3 from 399 ratings.

### Do Merge Defense Adventure or Stack Attack!! have ads?

Both Merge Defense Adventure and Stack Attack!! show ads.

### Which is updated more often, Merge Defense Adventure or Stack Attack!!?

Merge Defense Adventure ships an update every 2 months, and Stack Attack!! every 2 weeks. Most recently, Merge Defense Adventure was updated on November 3, 2026 and Stack Attack!! on October 30, 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.*