# Cosmic Synthesis vs Idle Polygon

The clearest difference is rating: Cosmic Synthesis at 4.0 against Idle Polygon's 3.0. Cosmic Synthesis also leads on ratings volume (15 vs 4). Idle Polygon's advantage is review sentiment (50% vs 29%) and iOS requirement (13.0 vs 15.6). On price, update cadence, 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 Idle Polygon sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Cosmic Synthesis holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 15 and 4 respectively. Written reviews complicate that: 29% of Cosmic Synthesis's written reviews are positive against 50% of Idle Polygon's, so the app with the better star average is not the one people write more warmly about.

Cosmic Synthesis ships an update weekly, Idle Polygon every 9 days. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Cosmic Synthesis | Idle Polygon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (15 ratings)](https://appshunter.io/ios/app/cosmic-synthesis-idle-builder/id6756239498/reviews)** | [3.0 (4 ratings)](https://appshunter.io/ios/app/idle-polygon/id6758945143/reviews) |
| Number of ratings | **15** | 4 |
| Positive reviews | 28.6% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Weekly** | Every 9 days |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 161 MB | 201 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NETBYTE UG (haftungsbeschränkt)](https://appshunter.io/developer/1854412817) | [KOKI MORITA](https://appshunter.io/developer/1875902049) |

## 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 Polygon

[App page](https://appshunter.io/ios/app/idle-polygon/id6758945143)

Engage in a visually stunning incremental game with RPG battle elements. Upgrade your geometries and income to astronomical levels, and master prestige cycles for endless replayability.

**Highlights:** Mesmerizing geometric visuals, Incremental upgrades and income, RPG battles with strategic gameplay, Endless replayability with prestige cycles, Hypnotic art style

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Diamond S | $0.99 | one-time |
| Diamond M | $2.99 | one-time |
| Offline Boost | $3.99 | one-time |
| Remove Ads | $4.99 | one-time |
| Diamond L | $5.99 | one-time |
| Diamond XL | $29.99 | one-time |
| Diamond MAX | $59.99 | one-time |


## Frequently asked questions

### Is Cosmic Synthesis free?

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

### Is Idle Polygon free?

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

### Which has better reviews, Cosmic Synthesis or Idle Polygon?

Cosmic Synthesis is rated higher. Cosmic Synthesis averages 4.0 out of 5 from 15 ratings, while Idle Polygon averages 3.0 from 4 ratings.

### Do Cosmic Synthesis or Idle Polygon have ads?

Both Cosmic Synthesis and Idle Polygon show ads.

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

Cosmic Synthesis ships an update weekly, and Idle Polygon every 9 days. Most recently, Cosmic Synthesis was updated on October 25, 2026 and Idle Polygon on October 28, 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.*