Let's install it on our phone

We discussed why Expo is great in Chapter 1, Introduction to React Native and Galio, and I think that the people from Expo did a great job at creating that framework. The thing with smartphones is that you can't install the app very easily on your phone.

Android is a lot more open compared to iOS and you'd probably be able to export an .apk file into your phone just to have it there. However, iOS doesn't let you do that.

Of course, we could use TestFlight, which is an Apple service that allows you to test and share your app with other testers. But that doesn't help us because who would install TestFlight on their phone just to see your one-screen app, especially when you need an Apple Developer account?

Expo offers us a great little app called Expo Go. You can find it on both App Store and Google Play Store. Download it and log in or create a new account if you don't already have one. Here, you can create a build...