It's a bit of a Catch-22.  Work around it by making an [tag:app] (or [tag:script]) post for your app (or script), but **put "(Placeholder)"** in the title.

Also, indicate in the post that the app is not yet ready for prime time.

This has already been done a few times, for example:

 - ["Chatdump - a site monitor (placeholder)"][1]
 - ["A small Stack Overflow browser for Android, for a school project (Placeholder)"][2]

 


  [1]: http://stackapps.com/q/4557/7653
  [2]: http://stackapps.com/q/4536/7653