# Unstable! vs AstroSpell

The clearest difference is price: Unstable! at Free against AstroSpell's $0.99. Unstable! also leads on iOS requirement (13.0 vs 17.0). AstroSpell's advantage is ads (none vs shown) and update cadence (every 6 days vs every 4 months). On in-app purchases and device support there is nothing between them.

Unstable! is free to download; AstroSpell costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Unstable! ships an update every 4 months, AstroSpell every 6 days. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Unstable! | AstroSpell |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| 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 6 days** |
| Monetization | Ad-supported | — |
| Size | 153 MB | 7 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [Leonardo Amora](https://appshunter.io/developer/690988469) | [Robert Corbin](https://appshunter.io/developer/1890247992) |

## 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


### AstroSpell

[App page](https://appshunter.io/ios/app/astrospell/id6773369340)

**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 AstroSpell free?

AstroSpell costs $0.99, with no in-app purchases.

### Do Unstable! or AstroSpell have ads?

Unstable! shows ads; AstroSpell does not.

### Which is updated more often, Unstable! or AstroSpell?

Unstable! ships an update every 4 months, and AstroSpell every 6 days. Most recently, Unstable! was updated on October 7, 2026 and AstroSpell on October 9, 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.*