This is an extraordinarily simple app that would have three screens. The first screen would track the price of 1 satoshi, and the number of satoshis in 1 dollar.
The second screen would track a user entered amount of bitcoin in terms of satoshis. (i.e. there would be an edit field for you to add a number of bitcoin--this would not hold bitcoin or connect to an outside bitcoin wallet).
The third screen would contain a compilation of articles detailing bitcoin's hard money properties and investment potential.
Come with your best sum offer for iOS and/or Android development.