# Idle Universe vs SoulStack

The clearest difference is in-app purchases: Idle Universe at none against SoulStack's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. SoulStack sells 1 one-off in-app purchase. Idle Universe asks for nothing beyond the download.

Idle Universe ships an update every 3 weeks, SoulStack every 2 weeks. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Idle Universe | SoulStack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Size | 3 MB | 49 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Murat Can KOC](https://appshunter.io/developer/1546710591) | [Xdge Technologies LLC](https://appshunter.io/developer/6792952936) |

## What reviewers say

### Idle Universe

[App page](https://appshunter.io/ios/app/idle-universe-space-adventure/id6584529153)

**Features:** macOS Compatibility

**In-app purchases:** none


### SoulStack

[App page](https://appshunter.io/ios/app/soulstack/id6792952934)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Soulstack: Full Game | $6.99 | one-time |


## Frequently asked questions

### Is Idle Universe free?

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

### Is SoulStack free?

SoulStack is free to download, with in-app purchases available.

### Do Idle Universe or SoulStack have ads?

Neither Idle Universe nor SoulStack shows ads.

### Which is updated more often, Idle Universe or SoulStack?

Idle Universe ships an update every 3 weeks, and SoulStack every 2 weeks. Most recently, Idle Universe was updated on October 27, 2026 and SoulStack on October 25, 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.*