# Castle Link vs HW Link V2

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 4 months) and iOS requirement (12.0 vs 15.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

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 4 months. The most recent releases landed on June 13, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Castle Link | HW Link V2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.8 (32 ratings)](https://appshunter.io/ios/app/castle-link/id1215086336/reviews) | **[3.5 (34 ratings)](https://appshunter.io/ios/app/hw-link-v2/id1539374531/reviews)** |
| Number of ratings | 32 | **34** |
| Positive reviews | 18.2% of reviews | **28.9% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | Free | Free |
| Size | 39 MB | 47 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Castle Creations, Inc.](https://appshunter.io/developer/1377811229) | [Hobbywing Technology Co.,Ltd](https://appshunter.io/developer/1033124554) |

## 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


### HW Link V2

[App page](https://appshunter.io/ios/app/hw-link-v2/id1539374531)

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.

**Highlights:** Wireless ESC programming, Remote parameter adjustment, Smartphone control, Supports car, aircraft, and boat ESCs, Compatible with HW WiFi express module/OTA Programmer

**Features:** macOS Compatibility, 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 HW Link V2 free?

HW Link V2 is free to download, with no in-app purchases.

### Which has better reviews, Castle Link or HW Link V2?

HW Link V2 is rated higher. Castle Link averages 1.8 out of 5 from 32 ratings, while HW Link V2 averages 3.5 from 34 ratings.

### Do Castle Link or HW Link V2 have ads?

Neither Castle Link nor HW Link V2 shows ads.

### Which is updated more often, Castle Link or HW Link V2?

Castle Link ships an update monthly, and HW Link V2 every 4 months. Most recently, Castle Link was updated on June 13, 2026 and HW Link V2 on September 26, 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.*