# Ecosysteme vs Cosmic Synthesis

The clearest difference is rating: Ecosysteme at 4.8 against Cosmic Synthesis's 4.0. Ecosysteme also leads on ads (none vs shown). Cosmic Synthesis's advantage is ratings volume (15 vs 5). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Ecosysteme sells 9 one-off in-app purchases and Cosmic Synthesis sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Ecosysteme holds the better App Store score, 4.8 against 4.0. Both are backed by a comparable volume of ratings — 5 and 15 respectively.

Ecosysteme ships an update every 2 weeks, Cosmic Synthesis weekly. The most recent releases landed on November 12, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Ecosysteme | Cosmic Synthesis |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/ecosysteme-idle-evolution/id6751442620/reviews)** | [4.0 (15 ratings)](https://appshunter.io/ios/app/cosmic-synthesis-idle-builder/id6756239498/reviews) |
| Number of ratings | 5 | **15** |
| Positive reviews | — | 28.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 396 MB | 161 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Romain Chauvire](https://appshunter.io/developer/1835141572) | [NETBYTE UG (haftungsbeschränkt)](https://appshunter.io/developer/1854412817) |

## What reviewers say

### Ecosysteme

[App page](https://appshunter.io/ios/app/ecosysteme-idle-evolution/id6751442620)

Create and evolve life from simple molecules to complex ecosystems. Discover hundreds of species, develop genetic traits, and shape diverse biomes in this idle evolution game inspired by biology and evolution theory.

**Highlights:** Evolve hundreds of species, Develop genetic traits, Create diverse biomes, Automatic resource production, Educational and contemplative gameplay, Inspired by biology and evolution

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 20 Nanocells | $1.99 | one-time |
| Starter pack : 150 nanocells ! | $2.99 | one-time |
| 100 Nanocells | $3.99 | one-time |
| STOP PUB | $4.99 | one-time |
| 225 Nanocells | $8.99 | one-time |
| 500 Nanocells | $17.99 | one-time |
| 1000 Nanocells | $24.99 | one-time |
| 2500 Nanocells | $49.99 | one-time |
| 5000 Nanocells | $89.99 | one-time |


### 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 |


## Frequently asked questions

### Is Ecosysteme free?

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

### Is Cosmic Synthesis free?

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

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

Ecosysteme is rated higher. Ecosysteme averages 4.8 out of 5 from 5 ratings, while Cosmic Synthesis averages 4.0 from 15 ratings.

### Do Ecosysteme or Cosmic Synthesis have ads?

Cosmic Synthesis shows ads; Ecosysteme does not.

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

Ecosysteme ships an update every 2 weeks, and Cosmic Synthesis weekly. Most recently, Ecosysteme was updated on November 12, 2026 and Cosmic Synthesis on November 5, 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.*