What is the difference between CLEAR Pass for CBP Mobile Passport and CLEAR? 

CLEAR Pass for CBP Mobile Passport is a free mobile app that helps eligible travelers through U.S. Customs and Border Protection when returning to the U.S. from another country. CLEAR Pass for CBP Mobile Passport securely saves your information, for free, for use every time you enter the United States. CLEAR Pass for CBP Mobile Passport is not for domestic travel. 

CLEAR is a service that uses your biometrics, like your irises or face, to confirm your identity and makes it safer and easier to get through security at domestic airports, stadiums and other U.S. venues. CLEAR is for domestic use only and can not be used with U.S. Customs and Border Protection (CBP)when returning to the U.S. from another country.