Right now, our app is working, but there is no way for the user to change the time settings for the timer. There might be some people for whom 15 minutes is the maximum working time, or, for some tasks, 90 minutes might be better. So, in this part, we’ll build a Settings screen for our app, where the user will be able to set the time chunks that work better for them. And, in building this part of the app, you'll learn one simple and effective way to save data onto a device with Flutter.
At the end of this part, the Settings screen will look like the following screenshot:
So, let's add a new file in the lib ...
