I'm loving your strategy. I can make it look so much like "not an ad", that they'll actually want to advertise it themselves, simply out of sheer willingness to spread the word on the app. I've done this kind of subliminal messaging before, and if I may say so myself, I'm awesome at it. Looking forward to hearing back from you ;)
(btw, delivery is on 1 day because I had to put in a number of days, but I can do it immediately after you let me know what kind of app it is, and what's the market you're aiming for)