You must be signed in with your Apple ID to download apps. If you aren't signed in, you will be prompted to do so or create a new account. Browse or Search:
Find the blue icon with a white "A" on your Home Screen. If you can't see it, swipe down from the middle of the screen and type "App Store" in the search bar.
The Apple App Store is the safest place to find programs for your iPhone.
Use the , Games , and Apps tabs at the bottom to discover new programs.