The application is a React Counter component. This was based off the great Redux intro tutorial by Dave Ceddia:
Blog for Redux Intro tutorial - https://daveceddia.com/how-does-redux-work/
Repo for Redux Intro tutorial - https://github.com/dceddia/redux-intro
There are two projects, one for the base original tutorial and another for a refactor to learn how to implement the re-ducks modular approach.
Original: redux-intro
Re-ducks: redux-intro-re-ducks