# Zarsthor vs InvaZium

The clearest difference is update cadence: InvaZium at every 6 days against Zarsthor's every 12 months. On price, ads, in-app purchases and device support there is nothing between them.

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

Zarsthor ships an update every 12 months, InvaZium every 6 days. The most recent releases landed on September 17, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Zarsthor | InvaZium |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 6 days** |
| Size | 48 MB | 54 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Dominik Babiarz](https://appshunter.io/developer/1451894310) | [Daniel Canete Campos](https://appshunter.io/developer/1273575992) |

## What reviewers say

### Zarsthor

[App page](https://appshunter.io/ios/app/zarsthor-asteroid-shooter/id6469375801)

**Features:** macOS Compatibility

**In-app purchases:** none


### InvaZium

[App page](https://appshunter.io/ios/app/invazium/id6480328706)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Zarsthor free?

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

### Is InvaZium free?

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

### Do Zarsthor or InvaZium have ads?

Neither Zarsthor nor InvaZium shows ads.

### Which is updated more often, Zarsthor or InvaZium?

Zarsthor ships an update every 12 months, and InvaZium every 6 days. Most recently, Zarsthor was updated on September 17, 2026 and InvaZium on September 11, 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.*