Is there a SpaceHey App?
No, there is no SpaceHey App yet.
We are currently putting our main focus on SpaceHey.com and try to make it great to use on both Computers and Mobile devices.
You can always visit SpaceHey.com on your phone's browser and click on "Add to Homescreen" to have it right on your Homescreen, similar to an App.
However, we understand that a native SpaceHey App for Andorid and iOS would be really great - that's why we are planning to create an App in the future. Stay tuned!