@Genechr
Good questions
> how do they notify someone that has downloaded their app?
Notifications is a planned native app feature. We are working on android support now. Once completed in the next 4-6 weeks we will be introducing more core services.
>Also, is there a way for the client to know who has downloaded their app so that they can keep them up-to-date on any specials they are offering?
A common approach is to entice user of your app to register to receive specials/coupons/…