Stack Attack!! vs Slapping Penguin
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Stack Attack!!
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.
- Defeat enemy waves
- Demolish enemy stacks
- Upgrade skills
- Save the cube world
- Space invader gameplay
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Defeat waves of enemies! Use your weapons to demolish the enemies' stacks! Choose the best skills to upgrade your power! Save the cube world from the evil hexes!
Slapping Penguin
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Slapping Penguin is a retro arcade challenge inspired by classic old-school games. Dodge enemies, react quickly, and survive as long as you can without getting slapped. Unlock Ninja Mode, defeat every enemy in your path, and push your high score to the limit. Simple controls, retro graphics, and addictive gameplay make Slapping Penguin easy to pick up—but only true masters can become a ninja.
Screenshots
Verdict
The clearest difference is in-app purchases: Slapping Penguin at none against Stack Attack!!'s 19. Slapping Penguin also leads on update cadence (every 2 days vs every 2 weeks) and iOS requirement (12.0 vs 14.0). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Stack Attack!! sells 19 one-off in-app purchases. Slapping Penguin asks for nothing beyond the download.
Stack Attack!! ships an update every 2 weeks, Slapping Penguin every 2 days. The most recent releases landed on August 19, 2026 and September 19, 2026 respectively.
| Parameter | Stack Attack!! | Slapping Penguin |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (403 ratings) — better | — |
| Positive reviews | 23.2% of reviews | — |
| Number of ratings | 403 — better | — |
| Update frequency | Every 2 weeks | Every 2 days — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 14.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 247 MB | 53 MB |
| Age rating | 12+ | 4+ |
| Developer | Voodoo | Aurelien YOL |
Bugs and requests
Stack Attack!!
Reported bugs
3 issues- Enemies' health scaling with player's attack power
- Levels freezing or getting stuck at checkpoints
- Weapon and upgrade levels getting downgraded randomly
Requested features
3 requests- Mute sound effects option
- Better communication from developers about updates
- More content and stages to progress through
Slapping Penguin
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Stack Attack!!
- Gem Pack Small$0.99
- Gold Pack Small$0.99
- Starter Pack$2.99
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- No Ads$2.99
- Gem Pack Medium$4.99
- 2X Speed!$4.99
- Gold Pack Medium$4.99
- Skip'its Medium Pack$5.99
- Gem Pack Large$9.99
- Gold Pack Large$9.99
- Premium Pass$14.99
- Gem Pack XL$19.99
- Skip'its Large Pack$19.99
- Gold Pack XL$19.99
- Diamond Hero$29.99
- Gem Pack XXL$49.99
- Gold Pack XXL$49.99
- Gem Pack XXXL$99.99
- Gold Pack XXXL$99.99
Slapping Penguin
No in-app purchases
Questions
Is Stack Attack!! free?
Is Slapping Penguin free?
Do Stack Attack!! or Slapping Penguin have ads?
Which is updated more often, Stack Attack!! or Slapping Penguin?
Other comparisons
