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 and tag it with [tag:placeholder].

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]


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Warning: Don't abuse this, though, or create an essentially empty post and not update it expeditiously.  Otherwise [the question will be closed][3] and, if not corrected, quickly deleted. 

 


  [1]: https://stackapps.com/q/4557/7653
  [2]: https://stackapps.com/q/4536/7653
  [3]: https://stackapps.com/questions/7490/what-to-do-about-the-tsunami-of-placeholder-apps-created-because-of-a-poorly-wri