iphone app replace or update?

Question

There is an existing iphone app, but its boring. However the same app shall be replaced by another more exiting app, BUT all data stored in each clients app database has to rema

Answer 1

You can just update the app, all data in the document directy of the sandbox is not touched when updating and app.

If you write an new app, then there is no way to get to the data of the old app unless you can grab them from, for example a server.

If you used CoreData, be sure to copy the original CoreData model to the new app.