# Block Stack vs Sky Stack

The clearest difference is ads: Block Stack at none against Sky Stack's shown. Block Stack also leads on monetization model (free vs ad-supported) and ratings volume (3 vs 1). Sky Stack's advantage is update cadence (every 3 days vs every 10 days). On price, rating, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Block Stack against 5.0 for Sky Stack. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

Block Stack ships an update every 10 days, Sky Stack every 3 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Block Stack | Sky Stack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/block-stack-tower-physics/id6759821751/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/sky-stack-tower-builder/id6761363764/reviews) |
| Number of ratings | **3** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 10 days | **Every 3 days** |
| Monetization | **Free** | Ad-supported |
| Size | 1 MB | 104 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [CyberGame Limited](https://appshunter.io/developer/1778824442) | [Mehmet Resat Senel](https://appshunter.io/developer/1867533935) |

## What reviewers say

### Block Stack

[App page](https://appshunter.io/ios/app/block-stack-tower-physics/id6759821751)

A physics-based stacking game where you build towers as high as possible without letting them fall. Experience realistic gravity and tension as an adaptive algorithm challenges your skill level with increasingly complex block shapes.

**Highlights:** Realistic physics simulation, Adaptive difficulty algorithm, Variety of block shapes, One-handed portrait play, Haptic feedback, Auto-save functionality

**Features:** macOS Compatibility

**In-app purchases:** none


### Sky Stack

[App page](https://appshunter.io/ios/app/sky-stack-tower-builder/id6761363764)

Stack falling blocks to construct the highest possible tower. Carefully move, rotate, and drop each piece to maintain balance. A single misstep can cause your creation to tumble.

**Highlights:** Physics-based stacking, Endless tower building, Intuitive controls, Stabilizer platforms, Limited fails, Global leaderboard, Ad-supported continues

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Block Stack free?

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

### Is Sky Stack free?

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

### Which has better reviews, Block Stack or Sky Stack?

Block Stack and Sky Stack are both rated 5.0 out of 5 on the App Store, from 3 and 1 ratings respectively.

### Do Block Stack or Sky Stack have ads?

Sky Stack shows ads; Block Stack does not.

### Which is updated more often, Block Stack or Sky Stack?

Block Stack ships an update every 10 days, and Sky Stack every 3 days. Most recently, Block Stack was updated on October 31, 2026 and Sky Stack on October 31, 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.*