Do you know that you should drink about 3 liters of water each day to stay healthy? Now you don't need to pickup your phone and find the app to log each glass of water you drank. Just use voice assistant in your home, smartwatch or phone to track your daily water intake.
This is also an open source project to show how to build voice assistant app. You can find it on Github and as a blog post describing how to build app like this.
Github repository: https://github.com/frogermcs/WaterLog-assistant-app