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)
Thank you for the feedback, I really appreciate it. Building my own brand and website has been on my mind for a long time, and this year I’m finally planning to focus on it seriously. I’m aiming to take this full-time since I truly enjoy working with subjects like Math and Critical Thinking