# Stack Perfect vs Sky Ace 3D

The clearest difference is in-app purchases: Stack Perfect at none against Sky Ace 3D's 1. Sky Ace 3D's advantage is update cadence (every 3 days vs every 3 months) and iOS requirement (11 vs 18.5). On price, ads and device support there is nothing between them.

Both are free to download. Sky Ace 3D sells 1 one-off in-app purchase. Stack Perfect asks for nothing beyond the download.

Stack Perfect ships an update every 3 months, Sky Ace 3D every 3 days. The most recent releases landed on September 17, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Stack Perfect | Sky Ace 3D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (6 ratings)](https://appshunter.io/ios/app/stack-perfect-3d-tower/id6757132012/reviews)** | — |
| Number of ratings | **6** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 3 MB | 9 MB |
| Requires iOS | 18.5 | **11** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Alper Ismet SULUN](https://appshunter.io/developer/1641912970) | [Catalin Berta](https://appshunter.io/developer/1592833249) |

## What reviewers say

### Stack Perfect

[App page](https://appshunter.io/ios/app/stack-perfect-3d-tower/id6757132012)

Build a towering structure by precisely dropping blocks, aiming for perfect fits to maintain stability and earn bonuses. Compete with friends directly through messages and on global leaderboards, with an accessible design for all players.

**Highlights:** Precision block stacking, iMessage competitive play, Apple Watch integration, Full accessibility support, Global leaderboards, Personalized stats tracking

**Features:** macOS Compatibility

**In-app purchases:** none


### Sky Ace 3D

[App page](https://appshunter.io/ios/app/sky-ace-3d/id6757394576)

**Features:** Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Game Access | $0.99 | one-time |


## Frequently asked questions

### Is Stack Perfect free?

Stack Perfect is free to download, with no in-app purchases.

### Is Sky Ace 3D free?

Sky Ace 3D is free to download, with in-app purchases available.

### Do Stack Perfect or Sky Ace 3D have ads?

Neither Stack Perfect nor Sky Ace 3D shows ads.

### Which is updated more often, Stack Perfect or Sky Ace 3D?

Stack Perfect ships an update every 3 months, and Sky Ace 3D every 3 days. Most recently, Stack Perfect was updated on September 17, 2026 and Sky Ace 3D on September 8, 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.*