B-KEY for Tesla Watch key is a lifestyle application designed specifically for Tesla vehicle owners, allowing them to control their cars via Bluetooth without the need for an account or internet connection. This free app supports multiple Bluetooth keys and features vertical summoning for compatible vehicles. Users can also enjoy standalone functionality on their Apple Watch, which requires a subscription for full access. The app integrates seamlessly with Siri, Face ID, and Touch ID for enhanced security and convenience.

In addition to its core functionalities, B-KEY offers a variety of customizable features, including support for Apple Watch complications, iPhone Home Screen widgets, and quick actions. With options for dark mode and light mode, the app caters to user preferences in visual design. It's essential to note that the app is compatible with Tesla Model 3, Model Y, Model S, and Model X from 2021 onwards, while older models are not supported. Overall, B-KEY provides a practical solution for Tesla owners looking to streamline their vehicle management.