This is a sample applciation built in React Native, might as well solve Sudoku puzzles with it 😁.
In order to run/build the application, there are a number of requirements. Please look at Getting Started from React Native which describes setting up your development environment.
Note: This was only tested on Android but should technically work on iOS as well
In order to run the tests, simply run npm test, this will execute the tests defined under the __tests__ folder.