Castle Link vs RadioLink
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Castle Link
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.
- Wireless programming via Bluetooth
- Firmware updates
- Save and load custom profiles
- Sync settings across iOS devices
- Offline functionality
- Data log viewing
Read full descriptionHide full description
The Castle Link™ app enables users to wirelessly program settings and update firmware on any current Castle Creations ESC, many older models and the BEC 2.0/BEC Pro using the waterproof Castle B•LINK Bluetooth® adapter. You can quickly alter parameters and fine-tune adjustments anytime, anywhere. - Save profiles to allow for quick changes between settings - Sync information between multiple iOS devices - No data/internet connection required - The Castle Link app can be used with multiple B•LINK adapters or can store vehicle information and allow users to use one adapter on multiple vehicles - Each B•LINK is protected with a 4-digit passcode to prevent tampering with your settings - Download and View Data Logs from compatible controllers Requirements: - Castle B•LINK Bluetooth adapter (011-0135-00)
RadioLink
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.
- Bluetooth connectivity
- Model data file management
- Save multiple configurations
- Select and brush model data
- UAV parameter adaptation
Read full descriptionHide full description
Radiolink connects with the built-in Bluetooth module of the T8S remote control produced by Radiolink to read and write the modified data. Multiple model data files can be saved, and the model data files can be selected and brushed into the remote control, so as to adapt to different uav parameters.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Castle Link | RadioLink |
|---|---|---|
| Price | Free | Free |
| Rating | 1.8 (32 ratings) | 1.9 (17 ratings) — better |
| Positive reviews | 18.2% of reviews | 25.0% of reviews — better |
| Number of ratings | 32 — better | 17 |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 | 11 — better |
| Further details — not scored | ||
| Size | 39 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Castle Creations Inc | Radiolink Electronics Co.,Ltd |
Customer experience
Castle Link
RadioLink
Bugs and requests
Castle Link
Reported bugs
16 issues- App crashes on passcode entry
- App freezes
- Bluetooth connection problems
- Bricking ESCs
- Throttle curve not working
Show 11 moreShow fewer
- Demo mode not functional
- Torque settings not saving
- Motor test not selectable
- Data logging issues
- Latest update causing problems
- Incompatibility with newer products
- Loading screen stuck
- Locking out ESC and beeping
- ESC not recognized by app
- Lost connection to ESC
- Firmware update failure
Requested features
9 requests- Add data logging to iOS app
- Allow viewing data logs on phone
- Fix throttle curve interface
- Add Android application
- Make motor test selectable
Show 4 moreShow fewer
- Fix data logging history clearing
- Allow firmware updates via app
- Support for newer ESCs (e.g., Copperhead)
- Allow app to work with cables
RadioLink
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Castle Link
No in-app purchases
RadioLink
No in-app purchases
