How does the Mobile Passport App differ from TSA Pre-Check?

The Mobile Passport App is not used for domestic travel inspections at TSA checkpoints nor affiliated with the TSA Pre-Check program at this time. Therefore, there is no designated space to enter your TSA Pre-Check information on the Mobile Passport App. The app is authorized by U.S. Customs and Border Protection (CBP) for U.S. citizens and Canadian visitors to ease their arrival into the United States.