# ECHO vs Arrow Loop

The clearest difference is in-app purchases: ECHO at none against Arrow Loop's 1. ECHO also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price and ads there is nothing between them.

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

## The numbers

| Metric | ECHO | Arrow Loop |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Size | 101 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [wapon Inc.](https://appshunter.io/developer/563984006) | [torankirite](https://appshunter.io/developer/1883564850) |

## What reviewers say

### ECHO

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

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

**In-app purchases:** none


### Arrow Loop

[App page](https://appshunter.io/ios/app/arrow-loop-logic-puzzle/id6799569871)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | one-time |


## Frequently asked questions

### Is ECHO free?

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

### Is Arrow Loop free?

Arrow Loop is free to download, with in-app purchases available.

### Do ECHO or Arrow Loop have ads?

Neither ECHO nor Arrow Loop shows ads.

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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.*