Did you ever get a call on your home phone and wonder if you should recognize the number? Perhaps you have someone who calls but never leaves a message, or aging parents who (still) dont get voicemail?
ID CallerID searches *your Contacts list* on your iPhone or iTouch with the phone number you enter and lists all matches or partial matches. Use each contact listed to go directly to a detail view where you can even call, email, or display a map directly from the application.