# Castle Link > Wireless programming and firmware updates for Castle Creations ESCs and BECs. (iPhone/iPad app by Castle Creations, Inc..) - Source: https://appshunter.io/ios/app/castle-link/id1215086336 (this page in markdown: same URL + `.md`) - Developer: [Castle Creations, Inc.](https://appshunter.io/developer/1377811229) - Category: Utilities - Price: Free - Rating: 1.75/5 from 32 App Store ratings · 44 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 39 MB - Languages: English - Released: 2018-05-01 - Data updated: 2026-06-13 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/castle-link/id1215086336/reviews.md ## What is Castle Link? 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) ## Key features - Wireless programming via Bluetooth - Firmware updates - Save and load custom profiles - Sync settings across iOS devices - Offline functionality - Data log viewing ## Recent user reviews (10 of 44) All indexed reviews: https://appshunter.io/ios/app/castle-link/id1215086336/reviews.md ### 1/5 — Awful application *2025-05-08, version 3.0.3* It barely functions and is very difficult to use. This application has convinced me to try and avoid Castle products. So utterly frustrating to use when you just want to make a few simple changes ### 1/5 — GARBAGE *2025-05-03, version 3.0.3* This app is junk just like the b link. App crashes and freezes and will brick your esc. Research it and see for yourself. Don’t waste your money on the garbage. ### 1/5 — No good *2025-04-19* Throttle curve doesn’t let u put to curve and when it does it won’t clear or respond ### 1/5 — Zero confidence in Castle Creations *2025-03-08, version 3.0.3* The app stinks. Locks up or crashes. Has problems making or retaining blue tooth connections for any length of time. Failed me again… I gave up on all Castle Creations products…. ### 3/5 — Not good so far *2025-03-07, version 3.0.3* Downloaded this as I have recently ordered the castlelink bluetooth adapter and a Micro x2 combo. First thing I tried was the demo mode, this gives you a choice of all products to click on and “demo” the software, yet can’t click on a single one. Now I’m wondering if I messed up purchasing the link adapter??? Will see and update when I receive x2. ### 1/5 — Bricked my esc *2025-01-05, version 3.0.3* It was working good and all then it just bricked my esc I would not recommend buying the b link totally not worth 50 bucks just buy the usb adapter to tune ur stuff ### 1/5 — Bricked my Mamba X ESC *2024-10-18, version 3.0.3* Attempted to update my Mamba X ESC via Castle B-Link and this app and bricked my ESC. My ESC is no longer functional and only displays a blinking red LED. Do not attempt to update your ESC via this app. ### 5/5 — Works well, I use it for racing! *2024-07-10, version 3.0.2* I use the Castle B-link frequently for racing 1/8th scale buggy and truggy. I’ve never had any big problems that a power cycle didn’t clear. The data logging is fantastic compared to other manufacturers. ### 1/5 — Castle creations products are all garbage garbage garbage ⚡️ *2024-06-29, version 3.0.2* Horrible products bugs in all the firmware everything from castle creations burns up up up CRAPPY CREATIONS😂😂😂😂 ### 3/5 — Lots of settings but very glitchy *2024-02-10, version 3.0.2* Trying to use throttle curve settings on iPhone is really bad. Lots of settings. I especially like save profile : I can easily put car in crawler, speed/trail, or a full on burnout mode. ## Frequently asked questions about Castle Link ### What does the Castle Link app do? The Castle Link app allows users to wirelessly program settings and update firmware on compatible Castle Creations ESCs and BEC devices. It enables quick parameter alterations and fine-tuning of adjustments anytime, anywhere, using a Bluetooth adapter. ### What are the key features of the Castle Link app? Key features include wireless programming and firmware updates, saving custom profiles for quick changes, syncing information between multiple iOS devices, offline functionality, and the ability to download and view data logs from compatible controllers. ### Is the Castle Link app free to use? Yes, the Castle Link app is free to download and use. However, it requires a compatible Castle B•LINK Bluetooth adapter to function, which is a separate hardware purchase. ### What devices is the Castle Link app compatible with? The app is designed to work with any current Castle Creations ESC, many older models, and the BEC 2.0/BEC Pro. A Castle B•LINK Bluetooth adapter is required for all compatible devices. ### Can I use the Castle Link app without an internet connection? Yes, a significant advantage of the Castle Link app is that no data or internet connection is required to use its programming and update features. This allows for adjustments in the field without connectivity. ## Version history (last 5 releases) ### 3.0.3 — 2024-09-18 Graphic and value bug fixes. ### 3.0.2 — 2022-05-18 Fixed issues - Database wouldn't update automatically - Connecting to a controller with unknown version number - Progress overlay not dismissing correctly - Datalogs importing into Castle Link for Windows - Datalog Viewer updated display to show information on smaller devices ### 3.0.1 — 2022-05-11 Spelling Correction - Matching version number to app on another platform ### 3.0 — 2022-05-11 Added ability to download and view Data Logs from Castle speed controller with Data Logging. ### 1.09 — 2021-04-26 Fixed issue with custom values on C.H.E.A.T. mode not selecting properly. ## Apps similar to Castle Link | App | Rating | Price | Category | | --- | --- | --- | --- | | [FuriCar](https://appshunter.io/ios/app/furicar/id1548174613) | 3.8 (40) | Free | Utilities | | [ISD Link](https://appshunter.io/ios/app/isd-link/id1568620244) | 2.1 (23) | Free | Utilities | | [SkyRC](https://appshunter.io/ios/app/skyrc/id1107478343) | 2.2 (9) | Free | Utilities | | [SpeedyBee App](https://appshunter.io/ios/app/speedybee-app/id1150315028) | 3.3 (118) | Free | Utilities | | [RC AI Mechanic](https://appshunter.io/ios/app/rc-ai-mechanic/id1645671690) | 5.0 (23) | Free | Utilities | | [ISD Go](https://appshunter.io/ios/app/isd-go/id1447072980) | 1.8 (30) | Free | Utilities | ## More apps by Castle Creations, Inc. - [CastleLink2](https://appshunter.io/ios/app/castlelink2/id6743709203) All apps by Castle Creations, Inc.: https://appshunter.io/developer/1377811229 ## Related topics [hobbywing link v2](https://appshunter.io/ios/topics/hobbywing-link-v2) · [hobbywing link](https://appshunter.io/ios/topics/hobbywing-link) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-13.*