# Castle Link vs RadioLink

Castle Link and RadioLink are too close to call on the numbers: across 10 compared parameters — price, rating, review sentiment and ratings volume among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 1.8 for Castle Link against 1.9 for RadioLink. Both are backed by a comparable volume of ratings — 32 and 17 respectively. Written reviews are what separate them: 18% of Castle Link's written reviews are positive against 25% of RadioLink's.

Castle Link ships an update monthly, RadioLink every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Castle Link | RadioLink |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.8 (32 ratings)](https://appshunter.io/ios/app/castle-link/id1215086336/reviews) | **[1.9 (17 ratings)](https://appshunter.io/ios/app/radiolink-en/id1526423846/reviews)** |
| Number of ratings | **32** | 17 |
| Positive reviews | 18.2% of reviews | **25.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free | Free |
| Size | 39 MB | 2 MB |
| Requires iOS | 12.0 | **11** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Castle Creations Inc](https://appshunter.io/developer/1377811229) | [Radiolink Electronics Co.,Ltd](https://appshunter.io/developer/1543646684) |

## What reviewers say

### Castle Link

[App page](https://appshunter.io/ios/app/castle-link/id1215086336)

Wirelessly program and update settings for compatible electronic speed controllers and BEC devices. Save and sync profiles across devices, and access data logs without an internet connection.

**Highlights:** Wireless programming via Bluetooth, Firmware updates, Save and load custom profiles, Sync settings across iOS devices, Offline functionality, Data log viewing

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to program ESC
- 👍 Data logging is fantastic
- 👍 Save profile feature is useful
- 👍 Convenient for quick setting changes

**What reviewers complain about**

- 🐛 App crashes frequently
- 🐛 App freezes often
- 🐛 Bluetooth connection issues
- 🐛 Bricks ESCs
- 🐛 Throttle curve not working

**Reported bugs**

- App crashes on passcode entry
- App freezes
- Bluetooth connection problems
- Bricking ESCs
- Throttle curve not working

**Requested features**

- Add data logging to iOS app
- Allow viewing data logs on phone
- Fix throttle curve interface
- Add Android application
- Make motor test selectable


### RadioLink

[App page](https://appshunter.io/ios/app/radiolink-en/id1526423846)

This utility app connects to a specific remote control model via Bluetooth to manage and transfer model data files. It allows users to save multiple configurations and apply them to their remote control for different UAV parameters.

**Highlights:** Bluetooth connectivity, Model data file management, Save multiple configurations, Select and brush model data, UAV parameter adaptation

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Castle Link free?

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

### Is RadioLink free?

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

### Which has better reviews, Castle Link or RadioLink?

RadioLink is rated higher. Castle Link averages 1.8 out of 5 from 32 ratings, while RadioLink averages 1.9 from 17 ratings.

### Do Castle Link or RadioLink have ads?

Neither Castle Link nor RadioLink shows ads.

### Which is updated more often, Castle Link or RadioLink?

Castle Link ships an update monthly, and RadioLink every 2 months. Most recently, Castle Link was updated on November 2, 2026 and RadioLink on November 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*