This is an Observable Framework app. To install the required dependencies, run:
npm install
Then, to start the local preview server, run:
npm run dev
Then visit http://localhost:3000 to preview your app.
For more, see https://observablehq.com/framework/getting-started.
This comparison lives at https://notofonts.github.io/android-comparison and rebuilds itself every week.
Remember to periodically update the ANDROID_BETA_URL when new Android preview releases come out.