# Skyscraper Logic vs ECHO

The clearest difference is in-app purchases: ECHO at none against Skyscraper Logic's 1. ECHO also leads on ads (none vs shown). Skyscraper Logic's advantage is iOS requirement (13.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. Skyscraper Logic sells 1 one-off in-app purchase. ECHO asks for nothing beyond the download.

## The numbers

| Metric | Skyscraper Logic | ECHO |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | — |
| Size | 61 MB | 101 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Huy Huynh](https://appshunter.io/developer/1815003126) | [wapon Inc.](https://appshunter.io/developer/563984006) |

## What reviewers say

### Skyscraper Logic

[App page](https://appshunter.io/ios/app/skyscraper-logic-modern-grid/id6759394032)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $5.99 | one-time |


### ECHO

[App page](https://appshunter.io/ios/app/echo-grids-number-puzzle/id6791798318)

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

**In-app purchases:** none


## Frequently asked questions

### Is Skyscraper Logic free?

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

### Is ECHO free?

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

### Do Skyscraper Logic or ECHO have ads?

Skyscraper Logic shows ads; ECHO does not.

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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.*