I'm a debut author and not established by any means. I do have marketing experience and can provide the following suggestions:
+ Put all apps and books under one umbrella brand. Your book doesn't have a unique name associated with it. Little Math Genius or Little Math Whiz, for example.
+ Setup an umbrella website (littlemathwhiz dot com) and blog
+ Start aggregating a user mailing list where you can provide gentle updates (beta test new features on quizmathgenius, new book announcement etc)
+ Put all apps and books under one umbrella brand. Your book doesn't have a unique name associated with it. Little Math Genius or Little Math Whiz, for example.
+ Setup an umbrella website (littlemathwhiz dot com) and blog
+ Start aggregating a user mailing list where you can provide gentle updates (beta test new features on quizmathgenius, new book announcement etc)