[Zubersoft]

I think the most important thing is to use the play store app and not a web browser. I don't think the app itself has a message about the app being available shortly. If you load the app, log in with the email address you used to purchase MobileSheetsPro, search for MobileSheetsPro and view the store page, it should indicate whether the app is installed and can be launched or whether it can be installed. 

If you view the app tray on the chromebook and view all the installed apps, is MobileSheetsPro not showing up? Can you take screenshots of what you see? You can send them to mike@zubersoft.com if you prefer.

Mike