It's a bit of a Catch-22.  Work around it by:

 1. Make a [tag:app] (or [tag:script]) post for your app (or script).
 2. Also tag it with [tag:placeholder].
 3. And put "`PLACEHOLDER - `" at the beginning of the title.

Also, indicate in the post text 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]


----------
Warning: **Don't abuse this, 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