# Cosmic Synthesis vs Coreshatter

The clearest difference is review sentiment: Coreshatter at 80% against Cosmic Synthesis's 29%. Coreshatter also leads on rating (4.7 vs 4.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Cosmic Synthesis sells 1 one-off in-app purchase and Coreshatter sells 8 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Coreshatter holds the better App Store score, 4.7 against 4.0. Both are backed by a comparable volume of ratings — 15 and 7 respectively. Written reviews point the same way: 29% of Cosmic Synthesis's written reviews are positive against 80% of Coreshatter's.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Cosmic Synthesis | Coreshatter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (15 ratings)](https://appshunter.io/ios/app/cosmic-synthesis-idle-builder/id6756239498/reviews) | **[4.7 (7 ratings)](https://appshunter.io/ios/app/coreshatter-idle-td-roguelite/id6780365607/reviews)** |
| Number of ratings | **15** | 7 |
| Positive reviews | 28.6% of reviews | **80.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Weekly | Weekly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 161 MB | 66 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [NETBYTE UG (haftungsbeschränkt)](https://appshunter.io/developer/1854412817) | [Idle Flow Games](https://appshunter.io/developer/1896726965) |

## 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 |


### Coreshatter

[App page](https://appshunter.io/ios/app/coreshatter-idle-td-roguelite/id6780365607)

Build defenses, draft powerful upgrades, and bank your progress in this idle tower defense roguelite.  The game continues to play and earn rewards while you're away, allowing for both quick check-ins and deep strategy sessions.

**Highlights:** Idle gameplay with offline progress, Roguelite drafting and build synergies, Deep progression systems, Ranked competitive ladders, In-run agency and clutch decisions, Accessibility options

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mainframe Subscription | $4.99 | per month |
| Starter Cache | $2.99 | one-time |
| Flux: Charge | $4.99 | one-time |
| Remove Ads + 50% Boost | $9.99 | one-time |
| Grid Season: Premium | $9.99 | one-time |
| Flux: Surge | $19.99 | one-time |
| Flux: Apex | $49.99 | one-time |
| Flux: Mega | $99.99 | one-time |


## Frequently asked questions

### Is Cosmic Synthesis free?

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

### Is Coreshatter free?

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

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

Coreshatter is rated higher. Cosmic Synthesis averages 4.0 out of 5 from 15 ratings, while Coreshatter averages 4.7 from 7 ratings.

### Do Cosmic Synthesis or Coreshatter have ads?

Both Cosmic Synthesis and Coreshatter show ads.

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

Cosmic Synthesis ships an update weekly, and Coreshatter weekly. Most recently, Cosmic Synthesis was updated on October 25, 2026 and Coreshatter 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.*