# Causality Puzzle vs ECHO BOM!

The clearest difference is in-app purchases: Causality Puzzle at none against ECHO BOM!'s 7. ECHO BOM!'s advantage is update cadence (every 2 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ECHO BOM! sells 7 one-off in-app purchases. Causality Puzzle asks for nothing beyond the download.

Causality Puzzle ships an update every 2 months, ECHO BOM! every 2 days. The most recent releases landed on October 22, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Causality Puzzle | ECHO BOM! |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 2 days** |
| Size | 76 MB | 100 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gurgen Arustamyan](https://appshunter.io/developer/1884835827) | [Umut Devrim CINAR](https://appshunter.io/developer/1890218779) |

## What reviewers say

### Causality Puzzle

[App page](https://appshunter.io/ios/app/causality-puzzle/id6760533588)

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

**In-app purchases:** none


### ECHO BOM!

[App page](https://appshunter.io/ios/app/echo-bom-neon-grid-puzzle/id6761548288)

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter Pack | $1.99 | one-time |
| Break Piggy Bank | $2.99 | one-time |
| Remove Ads | $4.99 | one-time |
| 500 Gems | $4.99 | one-time |
| Echo Pass Premium | $4.99 | one-time |
| 1200 Gems | $9.99 | one-time |
| Mega Bundle | $19.99 | one-time |


## Frequently asked questions

### Is Causality Puzzle free?

Causality Puzzle is free to download, with no in-app purchases.

### Is ECHO BOM! free?

ECHO BOM! is free to download, with in-app purchases available.

### Do Causality Puzzle or ECHO BOM! have ads?

Both Causality Puzzle and ECHO BOM! show ads.

### Which is updated more often, Causality Puzzle or ECHO BOM!?

Causality Puzzle ships an update every 2 months, and ECHO BOM! every 2 days. Most recently, Causality Puzzle was updated on October 22, 2026 and ECHO BOM! on October 9, 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.*