# GridLock vs Echo

The clearest difference is in-app purchases: Echo at none against GridLock's 4. GridLock's advantage is device support. On price and iOS requirement there is nothing between them.

Both are free to download. GridLock sells 4 one-off in-app purchases. Echo asks for nothing beyond the download.

## The numbers

| Metric | GridLock | Echo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | Every 3 months | — |
| Size | 9 MB | 1 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | — |
| Age rating | 4+ | 4+ |
| Developer | [Erdener Uyan](https://appshunter.io/developer/1843571074) | [BERKE ERKESIM](https://appshunter.io/developer/1878370920) |

## What reviewers say

### GridLock

[App page](https://appshunter.io/ios/app/gridlock-number-puzzle/id912871295)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pack of 10 Crowns | $0.99 | one-time |
| Pack of 30 Crowns | $1.99 | one-time |
| Pack of 60 Crowns | $2.99 | one-time |
| Pack of 120 Crowns | $3.99 | one-time |


### Echo

[App page](https://appshunter.io/ios/app/echo-grid-puzzle/id6759986579)

**In-app purchases:** none


## Frequently asked questions

### Is GridLock free?

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

### Is Echo free?

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

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*