Hi, am a web developer with experience in HTML5, CSS3, JavaScript, JQuery, PHP5, Smarty, MySql, Wordpress developer..., i can create this app for you, consider the estimated time on the bid includes testing and the creation of a flexible app, because i think that after a certain time you will try to expand the functionalities, which can be easy in a well planed and nice coded app, you can contact me for further details.
Regards,
Younes