# Project Planet Space vs CosmoMerge

The clearest difference is in-app purchases: Project Planet Space at none against CosmoMerge's 1. CosmoMerge's advantage is update cadence (every 2 days vs every 25 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. CosmoMerge sells 1 one-off in-app purchase. Project Planet Space asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Project Planet Space against 5.0 for CosmoMerge. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Project Planet Space ships an update every 25 months, CosmoMerge every 2 days. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Project Planet Space | CosmoMerge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/project-planet-space/id6499347273/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/cosmomerge/id6760329769/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 2 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 2 MB | 84 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Miroslav Hanzelka](https://appshunter.io/developer/1653768748) | [Qingdao Chuyan Technology Co., Ltd](https://appshunter.io/developer/1450752232) |

## What reviewers say

### Project Planet Space

[App page](https://appshunter.io/ios/app/project-planet-space/id6499347273)

Explore our solar system with an interactive map. Discover planetary gravity, temperatures, and atmospheric data. Calculate your weight on other worlds and learn fascinating space facts.

**Highlights:** Interactive solar system map, Personalized weight and age calculations, Detailed planetary data widgets, Multi-language support, Metric/Imperial unit switching, Cosmic museum aesthetic, Real astronomical data integration

**Features:** macOS Compatibility

**In-app purchases:** none


### CosmoMerge

[App page](https://appshunter.io/ios/app/cosmomerge/id6760329769)

Explore astronomy, geography, and history by merging tiles. Unlock knowledge and discover new entries in your atlas with each level you achieve. Enjoy a puzzle experience that educates and entertains.

**Highlights:** Merge tiles to unlock knowledge, Explore Solar System, Geography, and History, Atlas with descriptive entries, Undo and Revive gameplay options, Ad-free experience with purchase

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is Project Planet Space free?

Project Planet Space is free to download, with no in-app purchases.

### Is CosmoMerge free?

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

### Which has better reviews, Project Planet Space or CosmoMerge?

Project Planet Space and CosmoMerge are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Project Planet Space or CosmoMerge have ads?

Neither Project Planet Space nor CosmoMerge shows ads.

### Which is updated more often, Project Planet Space or CosmoMerge?

Project Planet Space ships an update every 25 months, and CosmoMerge every 2 days. Most recently, Project Planet Space was updated on November 4, 2026 and CosmoMerge 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.*