# Castle Link vs JETI Studio Mobile

The clearest difference is update cadence: Castle Link at monthly against JETI Studio Mobile's every 2 months. Castle Link also leads on iOS requirement (12.0 vs 15.3). On price, ads, in-app purchases and device support there is nothing between them.

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

Castle Link ships an update monthly, JETI Studio Mobile every 2 months. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Castle Link | JETI Studio Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.8 (32 ratings)](https://appshunter.io/ios/app/castle-link/id1215086336/reviews)** | — |
| Number of ratings | **32** | — |
| Positive reviews | 18.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free | — |
| Size | 39 MB | 55 MB |
| Requires iOS | **12.0** | 15.3 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Castle Creations Inc](https://appshunter.io/developer/1377811229) | [JETI model s.r.o.](https://appshunter.io/developer/1694213732) |

## 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


### JETI Studio Mobile

[App page](https://appshunter.io/ios/app/jeti-studio-mobile/id6450649167)

**In-app purchases:** none


## Frequently asked questions

### Is Castle Link free?

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

### Is JETI Studio Mobile free?

JETI Studio Mobile is free to download, with no in-app purchases.

### Do Castle Link or JETI Studio Mobile have ads?

Neither Castle Link nor JETI Studio Mobile shows ads.

### Which is updated more often, Castle Link or JETI Studio Mobile?

Castle Link ships an update monthly, and JETI Studio Mobile every 2 months. Most recently, Castle Link was updated on October 14, 2026 and JETI Studio Mobile on October 9, 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.*