article_snippet.sent: It was set up by biostatisticians from the University of Michigan and is available over 18s in the US .
article_snippet.sent: It was set up by biostatisticians from the University of Michigan, and although the app is hosted by Facebook, the site is not affiliated with the scheme in any other way.
article_snippet.sent: The researchers  complete each day.
article_snippet.sent: MailOnline has contacted the university for more information.
article_snippet.sent: Apple worked with University of Oxford, Stanford and others to develop this project.
highlights_snippet.sent: The app was designed by researchers at the University of Michigan .
  