Commercial Agent App

I am unsure if this can be done or not, as I do not have experience with the software, etc, I am listing below. I am currently having a MySQL database created that will allow me to enter new jobs I receive from my clients. I want to have an iPad/Iphone/android app created that will use some of the fields in the MySQL database. The idea will be that the user can logon to their iPad/Iphone/android app and view their current jobs. The app would allow them to select a job and send an update to the MySQL database. Is this possible? If so, can you please give me an estimate of the hours it will take to complete and the approximate cost. Also, if you have examples of similar work complete, I would like to look at them. I want to keep the interface very clean and easy to use. I look forward to your application.