I stumbled upon a solution to a long-standing issue I’ve had with App Inventor which is how to test, without a phone, apps that process SMS texts in some way. The issue is important because not all schools and developers have phones, but texting apps are fun and important so you’d like to be able to develop and test them even if you don’t have an Android.
So I was trying to build a screencast for the No Texting While Driving tutorial, and I wanted to be able to test/show the app on-screen. So I googled (go figure) and found out that the emulator id# serves as a phone number (go figure again, and why didn’t I try this before). So the solution is to open multiple emulators (click new emulator in app inventor twice). Connect one of them to app inventor and run the app on it, then use the normal texting app on the other to text the emulator running the app (with phone number something like 5554)
So now you can build/test SMS texting apps without owning an Android phone. I’m happy!