# Cosmic Summon vs Rainbow Buster

The clearest difference is in-app purchases: Cosmic Summon at none against Rainbow Buster's 2. Cosmic Summon also leads on iOS requirement (12.0 vs 18.5). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Rainbow Buster sells 2 one-off in-app purchases. Cosmic Summon asks for nothing beyond the download.

Cosmic Summon ships an update every 4 days, Rainbow Buster every 3 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | Cosmic Summon | Rainbow Buster |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rainbow-buster/id6762957622/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 4 days | **Every 3 days** |
| Monetization | — | Free with in-app purchases |
| Size | 34 MB | 10 MB |
| Requires iOS | **12.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Maojian Tang](https://appshunter.io/developer/1006529690) | [Croy Labs LLC](https://appshunter.io/developer/1829841723) |

## What reviewers say

### Cosmic Summon

[App page](https://appshunter.io/ios/app/cosmic-summon/id6760743174)

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

**In-app purchases:** none


### Rainbow Buster

[App page](https://appshunter.io/ios/app/rainbow-buster/id6762957622)

Launch volleys of balls to break rainbow bands in this physics-based arcade game. Survive as the board closes in, collect power-ups, and track your high scores. Offers adjustable settings and an optional ad-free experience.

**Highlights:** Physics-based arcade shots, Drag-to-aim controls, Shifting rainbow arc segments, Extra-ball power-ups, Score history and tracking, Adjustable gameplay settings

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |
| Advanced Settings | $9.99 | one-time |


## Frequently asked questions

### Is Cosmic Summon free?

Cosmic Summon is free to download, with no in-app purchases.

### Is Rainbow Buster free?

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

### Do Cosmic Summon or Rainbow Buster have ads?

Both Cosmic Summon and Rainbow Buster show ads.

### Which is updated more often, Cosmic Summon or Rainbow Buster?

Cosmic Summon ships an update every 4 days, and Rainbow Buster every 3 days. Most recently, Cosmic Summon was updated on October 25, 2026 and Rainbow Buster on October 25, 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.*