# Echo vs Clock24h

The clearest difference is price: Echo at Free against Clock24h's $1.99. Echo also leads on update cadence (every 9 days vs every 6 weeks). Clock24h's advantage is in-app purchases (none vs 2) and iOS requirement (15.0 vs 17.0). On ads and device support there is nothing between them.

Echo is free to download; Clock24h costs $1.99 up front. Echo sells 2 in-app purchases, starting at $4.99 per month. Clock24h asks for nothing beyond the download.

Echo ships an update every 9 days, Clock24h every 6 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Echo | Clock24h |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.9 (36 ratings)](https://appshunter.io/ios/app/echo-global-sdr-receiver/id6759174390/reviews)** | — |
| Number of ratings | **36** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 6 weeks |
| Monetization | Free | — |
| Size | 12 MB | 1 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Mark Garrison Jr.](https://appshunter.io/developer/1877165041) | [NNV.ehf](https://appshunter.io/developer/6771493326) |

## What reviewers say

### 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 |


### Clock24h

[App page](https://appshunter.io/ios/app/clock24h/id6780316600)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Echo free?

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

### Is Clock24h free?

Clock24h costs $1.99, with no in-app purchases.

### Do Echo or Clock24h have ads?

Neither Echo nor Clock24h shows ads.

### Which is updated more often, Echo or Clock24h?

Echo ships an update every 9 days, and Clock24h every 6 weeks. Most recently, Echo was updated on October 24, 2026 and Clock24h on October 25, 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.*