I would recommend searching the web for online developers, however, they are rather expensive and charge by the hour. A good starting point may be XDA Developers, but if you are in Zimbabwe, searching on Facebook is a good option too.
But to fully answer this question more precisely, there are a few things that I hope you have thought through about the application you developed such as cross platform support and the likes, just to begin with.
I myself am in the process of learning how to develop mobile applications but have not acquired enough knowledge to be of any significant help. However, should you wish to contact me, just comment on this post again and I will see how i can help.