Hi @Avril - the service you’re referring to is known as The PhoneGap Developer App. PhoneGap Build https://build.phonegap.com/ is a different service used to build your app in the cloud for distribution - the title of your post may confuse people who would otherwise have replied here.
I don’t use PhoneGap Build, but I have been using the PhoneGap Developer App in combination with “ionic serve” on the CLI. See this post: