IPhone APP help!

Hi all,
My boss wants me to try and write an iphone app for him. Essentially what he wants is an app that college coaches can download so they can go on to it at college showcase tournaments and bring up individual player pages that will have info on that player. I am merely a college comp sci major who has only taken a few programing classes thus far, so my boss appears to have a lot more faith in me then he should! My main questions were these:

1.) For updating the profile. I want the high school students to be able to go on and update their own profiles, is it easier for them to do it on a website and have the website update the app or for them to update the app using the app? How can this be sent out to all the people who use the app? How do most apps update?

2.) I was going to store the information in a tree so that when a player name is searched for it will go through the tree until it reaches the appropriate node. How can I store the profile in the node? Is it easiest to list all the information in the node and then call it using a different class that will assemble the profile design for the actual app page? Is using a tree the easiest/most efficient method?

I hope this makes sense! If you could help me out I would be incredibly grateful!

Thank you all so much!

 

Thanks guys!