Yea I noticed that too. They have their own appstore now where you can download their bitcoin apps. Maybe because their apps have a purchase option which is I think against google play tos.
Took me awhile to figure this out too, I contacted support and they were very responsive and directed me to their website where you can download directly.
You have to make sure the option to download from unknown sources is checked on your android though or it will not work.
I love these apps - great developers, I use them whenever I am in traffic, on the bus, taking a walk, or just plain bored.