When it comes to downloadable apps may it be exchanges or wallet apps I always look for the announcements in their actual website itself. This way I know that they do have an official downloadable app in the app store, other than that I always prefer on clicking the redirect links being given by these websites so that it leads me right straight to their download page without the hassle for searching it on my own.
This is the exact thing to so I have been trying to put so much emphasis in it... Get to the official website, Get the download links from the official site, Do a direct download or get redirected to the app stores using the links from the official websites
Thanks for bringing this attention. That's why it's very important to always read the reviews rather than just look at the star rating.