Android :: Need App That Makes Calls / Stores Data For I Phone / Android

The app I'd like to build aims at giving contact information of a person using a search engine. This is the basic feature.
To make it more appealing, I'd like to add those enhancement features:
(1) allowing making a phoning call to the contact (when pressing a button for ex.)
(2) allowing the user to store contact information that would be available off-line
I need to have it work for i phone, Android and Blackberry. The application should also provide the basic feature (with not necessarily the enhancement features) for the maximum phone devices. I'm a beginner in i phone, Android and Blackberry. What would be the more efficient way to code the app ? For example, is it possible to make a common web application for all the mobile devices to provide the basic feature (display contact info using the search engine) and only code the specific features using each specific language without re writing the common code ? How would it possible to achieve it? I would prefer not to use a 3rd application tool such as edgelib, xmlvm or phone Gap that generates code for you.