Tap the main clock on the home screen. The clock app for mine just disappeared and can't find the one i used to use but if you tap the main clock on the home screen(or at least home screen when you get the phone) it will bring up the clock app like the one I used to use.
At first I thought I was crazy because I couldn't find the alarm either! I did try tapping the clock, but it kept bringing up the weather. Anyway, I have it now. Thanks so much.