General IOS Question

You will need to store that data on the phone or somewhere and make a connection to it for instance on a web server that your app connects to.

As to how to do this I am unsure I am going through the track as we speak but I remember seeing in the library a thing called.... Core Data and that is essentially what you are looking for.

Another way to do this is to read and write files example: store the user data in a .txt or .dat file and load that data when needed. I still suggest you take a look at Core Data

For small amount of data you could use NSUserDefaults.

example

NSUserDefaults * defaults = [NSUserDefaults standardUserDefaults];

  NSDictionary * data = @{@"users":@[@"U1", @"U2"],
                          @"phones":@[@2239, @22331]
                          };

  [defaults setObject:data forKey:@"User Data"];

  [defaults synchronize];

I have three NSMutableArrays that will need to be saved so how would I save that. Also, where would I implement this code to save the data and how would I access the data after the app terminates?

Okay, thank you!