Dicio is a free and open source voice assistant. It supports many different skills and input/output methods, and it provides both speech and graphical feedback to a question. It uses Vosk for speech to text. It has multilanguage support, and is currently available in English, German and Italian.
Dicio answers questions about:
search: looks up information on DuckDuckGo (and in the future more engines) - Search for Dicio
weather: collects weather information from OpenWeatherMap - What's the weather like?
lyrics: shows Genius lyrics for songs - What's the song that goes we will we will rock you?
open: opens an app on your device - Open NewPipe
calculator: evaluates basic calculations - What is four thousand and two times three minus a million divided by three hundred?
Dicio can receive input through a text box or through Vosk speech to text, and can talk using toasts or the Android speech synthesis engine. Interactive graphical output is provided by skills when they answer a question.
Each skill can be enabled, disabled or customized using the related settings screen. A dark theme is available.
The user input is interpreted by specific, yet reusable, libraries: dicio-sentences-compiler, dicio-skill and dicio-numbers.
This app has the NonFreeNet anti-feature because some skills use non-free services to obtain the information requested by the user. You can easily disable unwanted skills or choose alternative services via settings.
Permissions
Allows applications to open network sockets.
Allows an application to record audio.
Allows query of any normal app on the device, regardless of manifest declarations.