Most version 1.0 of apps aren't localized. But you can still make it much easier for you to add localization support later. Instead of using string values directly, just wrap them with calls to
label1.text = @"Hello world"; label2.text = [NSString stringWithFormat:@"Name: %@", name]; becomes: label1.text = NSLocalizedString(@"Hello world", nil); label2.text = [NSString stringWithFormat:NSLocalizedString(@"Name: %@", nil), name];
They wouldn't do anything when you only support one language, but cuts down on a lot of effort doing search and replace later when you want to localize your app in future version.