Once you have built the Mileage Tracker app, you can log in to the Salesforce Mobile app and see how it functions on your phone. Try and get hands on experience with your Mileage Tracker app when making trips and log your mileage. See if you can come up with enhancements and improvements to the app to customize it and make it more user-friendly and your own!
In this lesson, I demonstrate how to preview the Salesforce mobile app in your browser. I also share a Chrome App that simulates the Saleforce mobile app.
Emulating a mobile browser with Google Chrome browser - https://help.salesforce.com/articleView?id=000204818&type=1
Salesforce Mobile Simulator App - https://chrome.google.com/webstore/detail/salesforce1-simulator/cknbjckicenodbiaejbmkjhldffonggp?hl=en-US