The rules morph to accommodate the type of project. It&#x27;s hard to show a mobile app directly, so an article describing the work with a link to the app is ok. In this case, since there&#x27;s a web version, the Show HN post should probably have linked to that, with a mention of the article in the comments. But it&#x27;s a bit late to change now so we&#x27;ll leave it as is.