Best Daddy App?

Cate • First time mommy due 11/8/16 with our precious baby boy Logan James
What are your favorite <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">pregnancy app</a> for baby daddies? My fiancé mentioned hearing about one that measured Baby in terms of tools and such, but we don't know what it is called.