Voice in a Can is a utility app designed for iPhone and Apple Watch, enabling users to utilize Alexa features directly from their wrist. Its primary functionalities include controlling smart home devices, managing shopping lists, and setting timers. The app supports Series 4 and newer Apple Watch models, offering a hands-free experience by allowing users to issue commands without saying 'Alexa'. This makes it convenient for quick tasks while on the go.

The app features various settings to enhance user experience, such as automatic listening on launch and support for Siri Shortcuts. Users can also customize watch complications and change language settings within the app. However, it's important to note that certain audio content, like music and announcements, is not supported due to restrictions from Amazon. Overall, Voice in a Can provides a practical solution for integrating Alexa with wearable technology.