Hi, Andrew!
I see you want php. But if you are interested, I can offer to make it using python. I developed a lot of bots on python and I know how to scrab data from playmarket and itunes.
Instead of desktop application I can offer to make web-service. And you could view necessary data from any device using your login password.
Also I can setup linux server, sendmail, etc.
I'm ready to answer for any questions and I'm ready to make test job if needed.
Best regards