# Power Grid Map vs Echo

The clearest difference is in-app purchases: Power Grid Map at none against Echo's 2. Power Grid Map also leads on update cadence (daily vs every 9 days). Echo's advantage is ads (none vs shown) and ratings volume (36 vs 3). On price, rating, device support and iOS requirement there is nothing between them.

Both are free to download. Echo sells 2 in-app purchases, starting at $4.99 per month. Power Grid Map asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Power Grid Map against 4.9 for Echo. That said, the two scores are not equally well evidenced: Echo has 36 ratings behind it against 3, so its average is the more settled of the two.

Power Grid Map ships an update daily, Echo every 9 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Power Grid Map | Echo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/power-grid-map/id6740839186/reviews)** | [4.9 (36 ratings)](https://appshunter.io/ios/app/echo-global-sdr-receiver/id6759174390/reviews) |
| Number of ratings | 3 | **36** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Daily** | Every 9 days |
| Monetization | Ad-supported | **Free** |
| Size | 60 MB | 12 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [FreshBizOpps, LLC](https://appshunter.io/developer/1506039373) | [Mark Garrison Jr.](https://appshunter.io/developer/1877165041) |

## What reviewers say

### Power Grid Map

[App page](https://appshunter.io/ios/app/power-grid-map/id6740839186)

Visualize electricity infrastructure across the United States, including power plants and daily energy mix changes. Learn about the energy infrastructure in your vicinity with this free, comprehensive tool.

**Highlights:** Visualize US electricity infrastructure, Locate power plants, Observe daily energy mix changes, Learn about local infrastructure, Updated hourly with public data

**Features:** macOS Compatibility

**In-app purchases:** none


### Echo

[App page](https://appshunter.io/ios/app/echo-global-sdr-receiver/id6759174390)

Tune into thousands of remote radio servers worldwide from your iPhone or iPad. Explore shortwave broadcasts, aviation communications, and more with a global interactive map and advanced tuning features. Enjoy uninterrupted background audio and a privacy-first experience.

**Highlights:** Global interactive map and search, Support for multiple SDR architectures, Scanner mode and OpenMHz archives, Pro-level tuning and analytics, Offline frequency library and logging, Uninterrupted background audio, Privacy-first design

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Echo Pro Monthly | $4.99 | per month |
| Echo Pro Annual | $39.99 | per year |


## Frequently asked questions

### Is Power Grid Map free?

Power Grid Map is free to download, with no in-app purchases.

### Is Echo free?

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

### Which has better reviews, Power Grid Map or Echo?

Power Grid Map is rated higher. Power Grid Map averages 5.0 out of 5 from 3 ratings, while Echo averages 4.9 from 36 ratings.

### Do Power Grid Map or Echo have ads?

Power Grid Map shows ads; Echo does not.

### Which is updated more often, Power Grid Map or Echo?

Power Grid Map ships an update daily, and Echo every 9 days. Most recently, Power Grid Map was updated on October 28, 2026 and Echo on October 31, 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.*