# Sky Stack vs StackUp

The clearest difference is in-app purchases: Sky Stack at none against StackUp's 1. Sky Stack also leads on iOS requirement (15.0 vs 26.4). On price, ads and device support there is nothing between them.

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

## The numbers

| Metric | Sky Stack | StackUp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/stackup-reflex-game/id6762530690/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 days | — |
| Monetization | — | Free with in-app purchases |
| Size | 104 MB | 4 MB |
| Requires iOS | **15.0** | 26.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Mehmet Resat Senel](https://appshunter.io/developer/1867533935) | [Hassen Ahmad](https://appshunter.io/developer/1892494943) |

## What reviewers say

### Sky Stack

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

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

**In-app purchases:** none


### StackUp

[App page](https://appshunter.io/ios/app/stackup-reflex-game/id6762530690)

Tap to stack blocks as high as possible. Precise landings extend your stack, while misses shorten it or cost you a life. Master tight timing and unlock challenging modes for an addictive reflex challenge.

**Highlights:** One-tap gameplay, Perfect landing bonuses, Score multiplier tiles, Multiple difficulty modes, Game Center leaderboards, Dark and light themes, Haptic feedback, Offline play

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is Sky Stack free?

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

### Is StackUp free?

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

### Do Sky Stack or StackUp have ads?

Both Sky Stack and StackUp show ads.

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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.*