# Unstable! vs Compound Quest

The clearest difference is ads: Compound Quest at none against Unstable!'s shown. Compound Quest also leads on update cadence (every 5 weeks vs every 4 months). On price, in-app purchases, device support and iOS requirement 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, Compound Quest every 5 weeks. Both last shipped on October 7, 2026.

## The numbers

| Metric | Unstable! | Compound Quest |
| --- | --- | --- |
| 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 | **No** |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Monetization | Ad-supported | — |
| Size | 153 MB | 26 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [Leonardo Amora](https://appshunter.io/developer/690988469) | [毓鑫 戴](https://appshunter.io/developer/1498577196) |

## 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


### Compound Quest

[App page](https://appshunter.io/ios/app/compound-quest/id6744287187)

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

**In-app purchases:** none


## Frequently asked questions

### Is Unstable! free?

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

### Is Compound Quest free?

Compound Quest is free to download, with no in-app purchases.

### Do Unstable! or Compound Quest have ads?

Unstable! shows ads; Compound Quest does not.

### Which is updated more often, Unstable! or Compound Quest?

Unstable! ships an update every 4 months, and Compound Quest every 5 weeks. Most recently, Unstable! was updated on October 7, 2026 and Compound Quest on October 7, 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.*