iPone, iPad, Android App needed with GPS and web portal

We are looking for someone who can create an app that is compatible across iphone, ipad, Android, and Blackberry. The app needs to be capable of controlling the devices GPS features in great detail and with great precision. The app must be capable of logging information from the GPS and transmitting that information to a web portal. It will also need to be capable of controlling the entire phone when activated so that the application is all that will run when activated unless a certain button within the application is pressed. We want to make sure that you cannot accidentally press a button on your phone and exit the app. The app must be capable of transmitting data to a web portal via data, phone, and SMS. The web portal portion of this project should be capable of interacting with the phone app via the web, another words, the information stream should be two ways between the web portal and the app. The app will also need a built in feature which allows users to comment/like the app on Facebook and Twitter. Non-Disclosure Agreement will be required. Please include in your bid/PM what time frame you think it would take, your realistic bid for this project, and any previous projects like this you have done. References, credentials, certificates, etc. are a plus as well. Happy Bidding!