# Cosmic Synthesis vs Idle Space Mining

The clearest difference is in-app purchases: Idle Space Mining at none against Cosmic Synthesis's 1. Cosmic Synthesis's advantage is ratings volume (15 vs 3). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Cosmic Synthesis sells 1 one-off in-app purchase. Idle Space Mining asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.0 for Cosmic Synthesis against 4.0 for Idle Space Mining. That said, the two scores are not equally well evidenced: Cosmic Synthesis has 15 ratings behind it against 3, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Cosmic Synthesis | Idle Space Mining |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (15 ratings)](https://appshunter.io/ios/app/cosmic-synthesis-idle-builder/id6756239498/reviews) | [4.0 (3 ratings)](https://appshunter.io/ios/app/idle-space-mining/id6790513254/reviews) |
| Number of ratings | **15** | 3 |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Weekly | Weekly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 161 MB | 121 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NETBYTE UG (haftungsbeschränkt)](https://appshunter.io/developer/1854412817) | [ISAAC MICHAEL FRETT](https://appshunter.io/developer/1877499106) |

## What reviewers say

### Cosmic Synthesis

[App page](https://appshunter.io/ios/app/cosmic-synthesis-idle-builder/id6756239498)

Build your own universe from atoms to galaxies in this idle-clicker adventure. Automate production, refine resources, and unlock cosmic milestones. The game adapts to both active strategists and idle players, offering a unique sci-fi experience.

**Highlights:** Tap to generate matter, Automate production chains, Refine resources into planets, Unlock over 50 cosmic milestones, Strategic talent tree, Prestige system for permanent upgrades, Offline progression

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $1.99 | one-time |


### Idle Space Mining

[App page](https://appshunter.io/ios/app/idle-space-mining/id6790513254)

Build and expand a space mining empire through incremental upgrades and strategic choices. Reset your progress to gain permanent bonuses and achieve ultimate power. Earn resources even while offline.

**Highlights:** Incremental mining empire building, Strategic doctrine choices, Prestige system with Dark Matter, Permanent upgrades via Star Shards, Offline earnings, Challenging game modes, Comet catching events

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

**In-app purchases:** none


## Frequently asked questions

### Is Cosmic Synthesis free?

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

### Is Idle Space Mining free?

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

### Which has better reviews, Cosmic Synthesis or Idle Space Mining?

Cosmic Synthesis and Idle Space Mining are both rated 4.0 out of 5 on the App Store, from 15 and 3 ratings respectively.

### Do Cosmic Synthesis or Idle Space Mining have ads?

Both Cosmic Synthesis and Idle Space Mining show ads.

### Which is updated more often, Cosmic Synthesis or Idle Space Mining?

Cosmic Synthesis ships an update weekly, and Idle Space Mining weekly. Most recently, Cosmic Synthesis was updated on October 25, 2026 and Idle Space Mining on October 24, 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.*