user42158: Two questions were posted that used a link to the Google Play store and a screenshot of the app as their citation. The same user also posted to the Chemistry Stack Exchange site with the same method.
What is the proper way to provide a citation if a smartphone app is used as a source?

user9943: Short answer
Smartphone apps shouldn't be used, or cited to build a proper answer or question.  
Background
Smart phone apps shouldn't be cited on scientific stacks. Even if they are knowledge databases of some kind, we need more proper sources than that. Personally I dislike even wikipedia as a source for the premise of an answer (or question), as the content is volatile, subject to change, stacked with circle referencing (A can be explained by B - link to B says that B can be explained by A) and indeed often outright incorrect. It's fine to use it as a link to highlight a term and use it for background purposes, but to use wilkipedia as a source to build your answer on, I would say no. Likewise, smartphone apps can be build by anyone, and stuffed with nonsense matter, which is not regulated, controlled, or reviewed in any way.

42158: <p>Two questions were posted that used a link to the Google Play store and a screenshot of the app as their citation. The same user also posted to the Chemistry Stack Exchange site with the same method.</p>

<p>What is the proper way to provide a citation if a smartphone app is used as a source?</p>
 9943: <p><strong>Short answer</strong><br>
Smartphone apps shouldn't be used, or cited to build a proper answer or question.  </p>

<p><strong>Background</strong><br>
Smart phone apps shouldn't be cited on scientific stacks. Even if they are knowledge databases of some kind, we need more proper sources than that. Personally I dislike even wikipedia as a source for the premise of an answer (or question), as the content is volatile, subject to change, stacked with circle referencing (A can be explained by B - link to B says that B can be explained by A) and indeed often outright incorrect. It's fine to use it as a link to highlight a term and use it for background purposes, but to use wilkipedia as a source to build your answer on, I would say <strong><em>no</em></strong>. Likewise, smartphone apps can be build by anyone, and stuffed with nonsense matter, which is not regulated, controlled, or reviewed in any way.</p>
