# KD Serials vs FMO 设备控制台

The clearest difference is price: KD Serials at Free against FMO 设备控制台's $3.99. KD Serials also leads on in-app purchases (none vs 1) and iOS requirement (9.0 vs 15.0). FMO 设备控制台's advantage is update cadence (every 5 days vs every 4 weeks). On ads and device support there is nothing between them.

KD Serials is free to download; FMO 设备控制台 costs $3.99 up front. FMO 设备控制台 sells 1 one-off in-app purchase. KD Serials asks for nothing beyond the download.

KD Serials ships an update every 4 weeks, FMO 设备控制台 every 5 days. The most recent releases landed on October 1, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | KD Serials | FMO 设备控制台 |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fmo/id6773165694/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 5 days** |
| Monetization | — | Paid |
| Size | 39 MB | 17 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hangzhou Junce Instruments Co., Ltd.](https://appshunter.io/developer/1535583983) | [Mobiliarbus](https://appshunter.io/developer/1474061315) |

## What reviewers say

### KD Serials

[App page](https://appshunter.io/ios/app/kd-serials/id1576490437)

**Features:** macOS Compatibility

**In-app purchases:** none


### FMO 设备控制台

[App page](https://appshunter.io/ios/app/fmo/id6773165694)

This utility app allows users to connect to and control FMO Radio devices from their iOS device. Monitor relay and radio status, view communication events, and stream live audio. It also provides APRS information and allows for saving favorite stations.

**Highlights:** Connect to FMO Radio devices, View relay and radio status, Monitor communication events, Stream live audio with background playback, View APRS grid, distance, and bearing, Favorite stations and connection history, Local demo mode

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SSTV Image Receiver | $1.99 | one-time |


## Frequently asked questions

### Is KD Serials free?

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

### Is FMO 设备控制台 free?

FMO 设备控制台 costs $3.99, and also offers in-app purchases.

### Do KD Serials or FMO 设备控制台 have ads?

Neither KD Serials nor FMO 设备控制台 shows ads.

### Which is updated more often, KD Serials or FMO 设备控制台?

KD Serials ships an update every 4 weeks, and FMO 设备控制台 every 5 days. Most recently, KD Serials was updated on October 1, 2026 and FMO 设备控制台 on October 7, 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.*