Less than 1 week –
Less than 10 hrs/week –
I developed an app using a free software, this is the link to the html5 version, http://appstore.monk.ee/details.php?appid=100507262.
But to get approval for the markets most especially iTunes has been an issue. Can you view the app, and see if you can re-write for both apple and google markets.
State your fee, and number of hours it will take you.