# Space Drift Pro vs Stack 101 Tower

The clearest difference is iOS requirement: Stack 101 Tower at 12.0 against Space Drift Pro's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Space Drift Pro ships an update every 4 days, Stack 101 Tower every 5 days. The most recent releases landed on November 9, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | Space Drift Pro | Stack 101 Tower |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 4 days** | Every 5 days |
| Size | 5 MB | 54 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Azra Selin Ozturk](https://appshunter.io/developer/1862213517) | [ZHENG YU-XIANG](https://appshunter.io/developer/1863257025) |

## What reviewers say

### Space Drift Pro

[App page](https://appshunter.io/ios/app/space-drift-pro/id6756936754)

**Features:** macOS Compatibility

**In-app purchases:** none


### Stack 101 Tower

[App page](https://appshunter.io/ios/app/stack-101-tower/id6759484448)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Space Drift Pro free?

Space Drift Pro is free to download, with no in-app purchases.

### Is Stack 101 Tower free?

Stack 101 Tower is free to download, with no in-app purchases.

### Do Space Drift Pro or Stack 101 Tower have ads?

Both Space Drift Pro and Stack 101 Tower show ads.

### Which is updated more often, Space Drift Pro or Stack 101 Tower?

Space Drift Pro ships an update every 4 days, and Stack 101 Tower every 5 days. Most recently, Space Drift Pro was updated on November 9, 2026 and Stack 101 Tower on November 13, 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.*