# RGB Block Puzzle vs Stack Em! Cosmic Blocks

The clearest difference is in-app purchases: Stack Em! Cosmic Blocks at none against RGB Block Puzzle's 4. Stack Em! Cosmic Blocks also leads on ads (none vs shown). RGB Block Puzzle's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. RGB Block Puzzle sells 4 one-off in-app purchases. Stack Em! Cosmic Blocks asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for RGB Block Puzzle against 5.0 for Stack Em! Cosmic Blocks. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

RGB Block Puzzle ships an update every 4 days, Stack Em! Cosmic Blocks every 3 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | RGB Block Puzzle | Stack Em! Cosmic Blocks |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/rgb-block-puzzle/id6762497619/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/stack-em-cosmic-blocks/id6774973758/reviews) |
| Number of ratings | 1 | **2** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 days | **Every 3 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 68 MB | 31 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [TOLGA YILMAZ](https://appshunter.io/developer/1894396939) | [JMM Technologies](https://appshunter.io/developer/6774973760) |

## What reviewers say

### RGB Block Puzzle

[App page](https://appshunter.io/ios/app/rgb-block-puzzle/id6762497619)

Engage in a relaxing block-puzzle experience with satisfying combos and colorful board clears. Choose between a timeless Classic Mode or an objective-driven Arcade Mode with progression and challenges. Customize your game with unique themes and utilize optional boosters to enhance your strategy.

**Highlights:** Classic Mode with no time limit, Arcade Mode with objectives and progression, Satisfying combos and full-clear moments, Rotatable pieces and sealed-block challenges, Customizable colors and visual themes, Optional boosters and in-game currency

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small RGB Coin Pack | $1.99 | one-time |
| Medium RGB Coin Pack | $3.99 | one-time |
| Large RGB Coin Pack | $9.99 | one-time |
| XLarge RGB Coin Pack | $19.99 | one-time |


### Stack Em! Cosmic Blocks

[App page](https://appshunter.io/ios/app/stack-em-cosmic-blocks/id6774973758)

A relaxing block puzzle game designed for short play sessions. Drag and drop pieces to complete rows and columns, clear space, and aim for high scores. Enjoy satisfying visual and audio feedback with multiple themes.

**Highlights:** Ad-free gameplay, Fast offline play, No account required, Smooth drag-and-drop controls, Satisfying clears and combos, Multiple unlockable themes

**In-app purchases:** none


## Frequently asked questions

### Is RGB Block Puzzle free?

RGB Block Puzzle is free to download, with in-app purchases available.

### Is Stack Em! Cosmic Blocks free?

Stack Em! Cosmic Blocks is free to download, with no in-app purchases.

### Which has better reviews, RGB Block Puzzle or Stack Em! Cosmic Blocks?

RGB Block Puzzle and Stack Em! Cosmic Blocks are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do RGB Block Puzzle or Stack Em! Cosmic Blocks have ads?

RGB Block Puzzle shows ads; Stack Em! Cosmic Blocks does not.

### Which is updated more often, RGB Block Puzzle or Stack Em! Cosmic Blocks?

RGB Block Puzzle ships an update every 4 days, and Stack Em! Cosmic Blocks every 3 days. Most recently, RGB Block Puzzle was updated on October 28, 2026 and Stack Em! Cosmic Blocks on October 24, 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.*