# Atomic Lumen vs Space Merge X

The clearest difference is rating: Atomic Lumen at 5.0 against Space Merge X's 3.8. Atomic Lumen also leads on in-app purchases (none vs 1) and update cadence (every 3 days vs every 3 months). Space Merge X's advantage is ratings volume (8 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Space Merge X sells 1 one-off in-app purchase. Atomic Lumen asks for nothing beyond the download.

Atomic Lumen holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Space Merge X has 8 ratings behind it against 1, so its average is the more settled of the two.

Atomic Lumen ships an update every 3 days, Space Merge X every 3 months. The most recent releases landed on October 16, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Atomic Lumen | Space Merge X |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/atomic-lumen/id898533869/reviews)** | [3.8 (8 ratings)](https://appshunter.io/ios/app/space-merge-x-planets-fun/id1522465254/reviews) |
| Number of ratings | 1 | **8** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 15 MB | 97 MB |
| Requires iOS | **7.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fausto Ristagno](https://appshunter.io/developer/482102205) | [Egor Kunovsky](https://appshunter.io/developer/1810232243) |

## What reviewers say

### Atomic Lumen

[App page](https://appshunter.io/ios/app/atomic-lumen/id898533869)

A fast-paced arcade game where players must tap orbiting spheres matching the core's color to keep it lit. Avoid incorrect colors to prevent the nucleus from shutting down and aim for high scores to challenge friends.

**Highlights:** Color matching gameplay, Level progression, High score challenges, Friend leaderboards, Bonus spheres, Immersive colors and sounds

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

**In-app purchases:** none


### Space Merge X

[App page](https://appshunter.io/ios/app/space-merge-x-planets-fun/id1522465254)

Merge identical planets by placing them on a circle to complete levels and discover new celestial bodies. Utilize boosters to strategically delete or merge planets, accelerating your journey through the cosmos. Enjoy a relaxing puzzle experience as you expand your planetary collection.

**Highlights:** Planet merging gameplay, Level completion for discovery, Booster items, Planet deletion option, Intuitive controls

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Boosters | $1.99 | one-time |


## Frequently asked questions

### Is Atomic Lumen free?

Atomic Lumen is free to download, with no in-app purchases.

### Is Space Merge X free?

Space Merge X is free to download, with in-app purchases available.

### Which has better reviews, Atomic Lumen or Space Merge X?

Atomic Lumen is rated higher. Atomic Lumen averages 5.0 out of 5 from 1 ratings, while Space Merge X averages 3.8 from 8 ratings.

### Do Atomic Lumen or Space Merge X have ads?

Neither Atomic Lumen nor Space Merge X shows ads.

### Which is updated more often, Atomic Lumen or Space Merge X?

Atomic Lumen ships an update every 3 days, and Space Merge X every 3 months. Most recently, Atomic Lumen was updated on October 16, 2026 and Space Merge X on October 3, 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.*