# Castle Link vs R1WURKS

The clearest difference is rating: R1WURKS at 4.0 against Castle Link's 1.8. Castle Link's advantage is update cadence (monthly vs every 2 months). On price, review sentiment, ratings volume and ads there is nothing between them.

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

R1WURKS holds the better App Store score, 4.0 against 1.8. Both are backed by a comparable volume of ratings — 32 and 14 respectively. Written reviews complicate that: 18% of Castle Link's written reviews are positive against 17% of R1WURKS's, so the app with the better star average is not the one people write more warmly about.

Castle Link ships an update monthly, R1WURKS every 2 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Castle Link | R1WURKS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.8 (32 ratings)](https://appshunter.io/ios/app/castle-link/id1215086336/reviews) | **[4.0 (14 ratings)](https://appshunter.io/ios/app/r1wurks/id1449942877/reviews)** |
| Number of ratings | **32** | 14 |
| Positive reviews | **18.2% of reviews** | 16.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free | Free |
| Size | 39 MB | 34 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Castle Creations Inc](https://appshunter.io/developer/1377811229) | [Steve Villanueva](https://appshunter.io/developer/1449942876) |

## 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


### R1WURKS

[App page](https://appshunter.io/ios/app/r1wurks/id1449942877)

This utility app connects to your ESC and smart devices, allowing wireless programming and real-time racing data monitoring. It stores up to 50 minutes of driving information for easy review and analysis.

**Highlights:** Wireless ESC programming, Real-time racing data, Driving data storage, Smart device connectivity, iPhone and iPad support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Castle Link free?

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

### Is R1WURKS free?

R1WURKS is free to download, with no in-app purchases.

### Which has better reviews, Castle Link or R1WURKS?

R1WURKS is rated higher. Castle Link averages 1.8 out of 5 from 32 ratings, while R1WURKS averages 4.0 from 14 ratings.

### Do Castle Link or R1WURKS have ads?

Neither Castle Link nor R1WURKS shows ads.

### Which is updated more often, Castle Link or R1WURKS?

Castle Link ships an update monthly, and R1WURKS every 2 months. Most recently, Castle Link was updated on October 24, 2026 and R1WURKS on October 24, 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.*