# Unstable! vs Stack Tower Shooter

The clearest difference is iOS requirement: Stack Tower Shooter at 11.0 against Unstable!'s 13.0. 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.

Unstable! ships an update every 4 months, Stack Tower Shooter every 6 months. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Unstable! | Stack Tower Shooter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (5 ratings)](https://appshunter.io/ios/app/unstable/id1282444122/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 4 months** | Every 6 months |
| Monetization | Ad-supported | — |
| Size | 153 MB | 75 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [Leonardo Amora](https://appshunter.io/developer/690988469) | [Arjun Cherukuri](https://appshunter.io/developer/1064867066) |

## What reviewers say

### Unstable!

[App page](https://appshunter.io/ios/app/unstable/id1282444122)

Control a bar to defend falling balls from a central core. Collect power-ups to enhance your gameplay and see how long you can survive. Enjoy endless, casual fun with new levels and music.

**Highlights:** Defend falling balls, Move bar with touch/drag, Collect power-ups, Endless gameplay, New level, new song, Casual mechanics

**Features:** Vision Pro support

**In-app purchases:** none


### Stack Tower Shooter

[App page](https://appshunter.io/ios/app/stack-tower-shooter/id6449821056)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Unstable! free?

Unstable! is free to download, with no in-app purchases.

### Is Stack Tower Shooter free?

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

### Do Unstable! or Stack Tower Shooter have ads?

Both Unstable! and Stack Tower Shooter show ads.

### Which is updated more often, Unstable! or Stack Tower Shooter?

Unstable! ships an update every 4 months, and Stack Tower Shooter every 6 months. Most recently, Unstable! was updated on October 7, 2026 and Stack Tower Shooter on October 1, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*