Is your application worth an investment of ~$19 a year?
Look at what $19 a year will get you:
http://lowendbox.com/blog/black-fri...-and-7month-3gb-openvz-vps-in-five-locations/
Your very own VPS!
I have two VPSs with WeLoveServers and have had no problems so far - in fact they've both been reliable and fast.
Install Ubuntu 12.04, apache, PHP and MySQL and you have everything you need.
You can run the B4A RDC library on such a server or use PHP scripts to provide a web service.
Martin.