# Echo vs M5Stack AIFlow

The clearest difference is in-app purchases: M5Stack AIFlow at none against Echo's 2. M5Stack AIFlow also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Echo sells 2 in-app purchases, starting at $4.99 per month. M5Stack AIFlow asks for nothing beyond the download.

Echo ships an update weekly, M5Stack AIFlow every 2 weeks. The most recent releases landed on October 12, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Echo | M5Stack AIFlow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (33 ratings)](https://appshunter.io/ios/app/echo-global-sdr-receiver/id6759174390/reviews)** | — |
| Number of ratings | **33** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Free | — |
| Size | 11 MB | 24 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mark Garrison Jr.](https://appshunter.io/developer/1877165041) | [M5Stack Technology Co., Ltd.](https://appshunter.io/developer/1726975189) |

## 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 |


### M5Stack AIFlow

[App page](https://appshunter.io/ios/app/m5stack-aiflow/id6788680064)

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

**In-app purchases:** none


## Frequently asked questions

### Is Echo free?

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

### Is M5Stack AIFlow free?

M5Stack AIFlow is free to download, with no in-app purchases.

### Do Echo or M5Stack AIFlow have ads?

Neither Echo nor M5Stack AIFlow shows ads.

### Which is updated more often, Echo or M5Stack AIFlow?

Echo ships an update weekly, and M5Stack AIFlow every 2 weeks. Most recently, Echo was updated on October 12, 2026 and M5Stack AIFlow on September 30, 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.*