Recommended control or page flow for iOS app

I have an app that implement only two main features - a form to create a table entry and another to look it up with entry screen as login screen. What is the best way to implement the screen flow navigation to these different features? Possible options:

1. Have a new screen after login screen to display a menu to navigate to form or to search screen - just one more screen for navigation purpose is not very intuitive
2. Use tab bar controller - but usually tab bar has minimum of 3 items, in my case its only two
3. Any other recommendations?