I have a website that allows users to sign up and track the number of flights of stairs they take each day. The website / server calculates things such as Calories burned and provides rewards, etc. when the users reach milestones.

I need phone applications that are very simple in nature, and just allow the user to enter his or her data on their phone. It is just 3 screens, a login, data entry, and a confirmation that the data was successfully sent to the server. The website / server should continue to do all the calculations.

I would like the application developed for the iPhone, Droid, and Blackberry, but think it is best to go with the iPhone first as a trial app.