To see how this app works, sign up for a developers account at https://www.twilio.com/ and open up the script.js file.
Replace the Authentication token, AccountSID and phone number with the ones associated with your account.
Download Apache Cordova and open up terminal (for mac).
When you're in the directory you want to have your app in, type
cordova create (APP_NAME)
Look into your folder and find a folder called 'www'
Delete the files inside the folder and navigate back to the HackDavis2018 folder and copy all the files and paste it into 'www'
Go back to your terminal and type
cd (APP_NAME)
Inside your folder, type
cordova platforms add android //or whatever platform you would like. Find the full list on the Apache Cordova documentation
Open up android studio and navigate into the platforms folder and then into android and open up the project.
Now, you can run the app on a target android device.