# Cosmic Synthesis vs Ironvoid

The clearest difference is review sentiment: Ironvoid at 100% against Cosmic Synthesis's 29%. Ironvoid also leads on rating (4.7 vs 4.0) and update cadence (every 3 days vs weekly). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Cosmic Synthesis sells 1 one-off in-app purchase and Ironvoid sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Ironvoid holds the better App Store score, 4.7 against 4.0. Both are backed by a comparable volume of ratings — 15 and 27 respectively. Written reviews point the same way: 29% of Cosmic Synthesis's written reviews are positive against 100% of Ironvoid's.

Cosmic Synthesis ships an update weekly, Ironvoid every 3 days. The most recent releases landed on November 5, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Cosmic Synthesis | Ironvoid |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (15 ratings)](https://appshunter.io/ios/app/cosmic-synthesis-idle-builder/id6756239498/reviews) | **[4.7 (27 ratings)](https://appshunter.io/ios/app/ironvoid-pixel-idle-rpg/id6794704140/reviews)** |
| Number of ratings | 15 | **27** |
| Positive reviews | 28.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 161 MB | 47 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [NETBYTE UG (haftungsbeschränkt)](https://appshunter.io/developer/1854412817) | [2VIBE TECH](https://appshunter.io/developer/6790836350) |

## 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 |


### Ironvoid

[App page](https://appshunter.io/ios/app/ironvoid-pixel-idle-rpg/id6794704140)

An idle RPG where your squad automatically battles enemies on a horizontal line. Focus on building and upgrading your units, managing their gear, and strategically using special stones to enhance their abilities. Progress continues even when you're offline.

**Highlights:** Automatic squad combat, Deep unit customization, Loot and gear merging, Strategic stone socketing, Offline progression, No gacha or paywalls

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Supporter Badge | $0.99 | one-time |
| Auto Salvage | $1.99 | one-time |
| Early Unit | $2.99 | one-time |
| Bag Expansion | $2.99 | one-time |
| 7-Day Gold | $3.99 | one-time |
| Marksman | $4.99 | one-time |
| Raider | $4.99 | one-time |
| Remove Ads | $4.99 | one-time |
| 20 Chests | $5.99 | one-time |
| Special Unit | $6.99 | one-time |


## Frequently asked questions

### Is Cosmic Synthesis free?

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

### Is Ironvoid free?

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

### Which has better reviews, Cosmic Synthesis or Ironvoid?

Ironvoid is rated higher. Cosmic Synthesis averages 4.0 out of 5 from 15 ratings, while Ironvoid averages 4.7 from 27 ratings.

### Do Cosmic Synthesis or Ironvoid have ads?

Both Cosmic Synthesis and Ironvoid show ads.

### Which is updated more often, Cosmic Synthesis or Ironvoid?

Cosmic Synthesis ships an update weekly, and Ironvoid every 3 days. Most recently, Cosmic Synthesis was updated on November 5, 2026 and Ironvoid on November 10, 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.*