Castle Link vs HW Link V2
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
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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)
HW Link V2
This application allows users to wirelessly program ESC parameters on compatible car, aircraft, and boat electronic speed controllers. Connect via a WiFi module or OTA Programmer to adjust settings remotely from your smartphone.
- Wireless ESC programming
- Remote parameter adjustment
- Smartphone control
- Supports car, aircraft, and boat ESCs
- Compatible with HW WiFi express module/OTA Programmer
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The ESC can now use a wireless connection via the use of the HW WiFi express module or OTA Progammer for thefollowing operating systems ; iOS phone (using the HW LINK V2 APP) users can easily andremotely (without leaving the control stand) program the ESC parameters displayed on the smartphone to their own preference.Work on the XERUN series, EZRUN series of car ESCs, and the Platinum series of aircraft ESCs, and SEAKING PRO series of boat ESCs.
Screenshots
Verdict
The clearest difference is rating: HW Link V2 at 3.5 against Castle Link's 1.8. HW Link V2 also leads on review sentiment (29% vs 18%). Castle Link's advantage is update cadence (monthly vs every 3 months). On price, ratings volume, ads and in-app purchases there is nothing between them.
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.
HW Link V2 holds the better App Store score, 3.5 against 1.8. Both are backed by a comparable volume of ratings — 32 and 34 respectively. Written reviews point the same way: 18% of Castle Link's written reviews are positive against 29% of HW Link V2's.
Castle Link ships an update monthly, HW Link V2 every 3 months. The most recent releases landed on June 13, 2026 and August 18, 2026 respectively.
| Parameter | Castle Link | HW Link V2 |
|---|---|---|
| Price | Free | Free |
| Rating | 1.8 (32 ratings) | 3.5 (34 ratings) — better |
| Positive reviews | 18.2% of reviews | 28.9% of reviews — better |
| Number of ratings | 32 | 34 — better |
| Update frequency | Monthly — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 39 MB | 53 MB |
| Age rating | 4+ | 4+ |
| Developer | Castle Creations, Inc. | Hobbywing Technology Co.,Ltd |
Customer experience
Castle Link
HW Link V2
In-app purchases
Castle Link
No in-app purchases
HW Link V2
No in-app purchases
