Hello folks! We’ve updated this behavior recently, so old app names are no longer available even after app deletion. Since these app names are used primarily for indexing purposes – that is to say, they’re not visible to your users after you’ve upgraded to a plan where you can place your app on a custom domain – we’ve chosen to do this to allow our team a better means of keeping track of deleted applications.
We are also working on a way to allow our Success team to “free up” these app names upon user request, so once that feature is available you’ll be able to write in to us at support@bubble.io and have us permanently clear out your old app’s history to reuse the name.