# Castle Link vs RC Gears

The clearest difference is review sentiment: RC Gears at 94% against Castle Link's 18%. RC Gears also leads on rating (4.5 vs 1.8). On price, ratings volume, update cadence 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.

RC Gears holds the better App Store score, 4.5 against 1.8. Both are backed by a comparable volume of ratings — 32 and 55 respectively. Written reviews point the same way: 18% of Castle Link's written reviews are positive against 94% of RC Gears's.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on June 13, 2026 and July 4, 2026 respectively.

## The numbers

| Metric | Castle Link | RC Gears |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.8 (32 ratings)](https://appshunter.io/ios/app/castle-link/id1215086336/reviews) | **[4.5 (55 ratings)](https://appshunter.io/ios/app/rc-gears/id1545490832/reviews)** |
| Number of ratings | 32 | **55** |
| Positive reviews | 18.2% of reviews | **94.2% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Free | Free |
| Size | 39 MB | 60 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Castle Creations, Inc.](https://appshunter.io/developer/1377811229) | [SkyRC Technology Co.,Ltd.](https://appshunter.io/developer/580032028) |

## 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


### RC Gears

[App page](https://appshunter.io/ios/app/rc-gears/id1545490832)

This application connects to a specific corner weight system to measure and display the weight distribution of RC cars. Users can view data, calibrate the scale, and adjust settings like auto power-off via Bluetooth. It's designed for precise weight analysis in RC racing.

**Highlights:** Measure RC car weight distribution, View weight data via Bluetooth, Calibrate the scale, Set auto power-off time, Connects to SCWS2000 system

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Accurate results
- ✨ Clean interface
- ✅ Works smoothly
- 💡 Compact and well-thought-out device

**What reviewers complain about**

- 🐛 Glitchy app
- 🐛 App freezing
- 🐛 Bluetooth connection issues
- 🐛 Incompatible with iOS 18
- 🐛 Reduced functionality compared to older versions

**Reported bugs**

- Doesn't connect to Bluetooth with iOS 18
- Shows errors on scales
- Max speed shown is rounded to a whole number
- App still freezing up when trying to get speed information
- Bluetooth reconnect not always working

**Requested features**

- Ability to save preset/default distances on drag mode
- Ability to export data for analysis (e.g., with Excel)
- Support for 1/5 cars
- More functions for GNSS performance analyzer
- Waterproof GNSS


## Frequently asked questions

### Is Castle Link free?

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

### Is RC Gears free?

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

### Which has better reviews, Castle Link or RC Gears?

RC Gears is rated higher. Castle Link averages 1.8 out of 5 from 32 ratings, while RC Gears averages 4.5 from 55 ratings.

### Do Castle Link or RC Gears have ads?

Neither Castle Link nor RC Gears shows ads.

### Which is updated more often, Castle Link or RC Gears?

Castle Link ships an update monthly, and RC Gears monthly. Most recently, Castle Link was updated on June 13, 2026 and RC Gears on July 4, 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.*