Castle Link vs JETI Studio Mobile
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)
JETI Studio Mobile
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With the JETI Studio Mobile app, you can connect to the latest generation of transmitters via Bluetooth and monitor a variety of telemetry on your mobile devices. Moreover, you can analyze JETI log files from the transmitter or JETI Studio in offline (without needing a Bluetooth connection). The app has a very friendly dashboard showing several graphical and numerical representations of telemetry data. The JETI Studio Mobile automatically sorts telemetry data based on the selected model on the transmitter. Recording data is fully supported also with a complex database. You can show the trajectory of your model on the maps in both modes (real-time, offline). Alarms are fully supported with audiovisual and vibration feedback. For better customer comfort full-screen mode and black theme are available.
Screenshots
Verdict
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.
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.
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.
| Parameter | Castle Link | JETI Studio Mobile |
|---|---|---|
| Price | Free | Free |
| Rating | 1.8 (32 ratings) — better | — |
| Positive reviews | 18.2% of reviews | — |
| Number of ratings | 32 — better | — |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.3 |
| Further details — not scored | ||
| Size | 39 MB | 55 MB |
| Age rating | 4+ | 4+ |
| Developer | Castle Creations Inc | JETI model s.r.o. |
Bugs and requests
Castle Link
Reported bugs
16 issues- App crashes on passcode entry
- App freezes
- Bluetooth connection problems
- Bricking ESCs
- Throttle curve not working
Show 11 moreShow fewer
- Demo mode not functional
- Torque settings not saving
- Motor test not selectable
- Data logging issues
- Latest update causing problems
- Incompatibility with newer products
- Loading screen stuck
- Locking out ESC and beeping
- ESC not recognized by app
- Lost connection to ESC
- Firmware update failure
Requested features
9 requests- Add data logging to iOS app
- Allow viewing data logs on phone
- Fix throttle curve interface
- Add Android application
- Make motor test selectable
Show 4 moreShow fewer
- Fix data logging history clearing
- Allow firmware updates via app
- Support for newer ESCs (e.g., Copperhead)
- Allow app to work with cables
JETI Studio Mobile
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Castle Link
No in-app purchases
JETI Studio Mobile
No in-app purchases









