# ECHO Survival AI vs GridDown

The clearest difference is in-app purchases: GridDown at none against ECHO Survival AI's 2. ECHO Survival AI's advantage is update cadence (every 3 months vs every 6 months) and iOS requirement (17.0 vs 26.5). On price, ads and device support there is nothing between them.

Both are free to download. ECHO Survival AI sells 2 one-off in-app purchases. GridDown asks for nothing beyond the download.

ECHO Survival AI ships an update every 3 months, GridDown every 6 months. The most recent releases landed on October 9, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | ECHO Survival AI | GridDown |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 6 months |
| Size | 97 MB | 6 MB |
| Requires iOS | **17.0** | 26.5 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [ehsan azish](https://appshunter.io/developer/1622575303) | [YOURFULLSTACK, LLC](https://appshunter.io/developer/363434825) |

## What reviewers say

### ECHO Survival AI

[App page](https://appshunter.io/ios/app/echo-survival-ai/id6756616533)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock offline use forever | $12.99 | one-time |
| Full version | $12.99 | one-time |


### GridDown

[App page](https://appshunter.io/ios/app/griddown/id6760301965)

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

**In-app purchases:** none


## Frequently asked questions

### Is ECHO Survival AI free?

ECHO Survival AI is free to download, with in-app purchases available.

### Is GridDown free?

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

### Do ECHO Survival AI or GridDown have ads?

Neither ECHO Survival AI nor GridDown shows ads.

### Which is updated more often, ECHO Survival AI or GridDown?

ECHO Survival AI ships an update every 3 months, and GridDown every 6 months. Most recently, ECHO Survival AI was updated on October 9, 2026 and GridDown on October 28, 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.*