score:6
CLEAR lets you go through a shorter line and skip the ID check using biometrics (the long security line is generally the line to the ID check, so skipping it can be a major time-saver). As their site shows, it does not make any difference to the actual TSA screening; you get sent to either PreCheck or normal lines depending on whether or not your ticket qualifies for PreCheck (i.e. you're a member, the airport has PreCheck, the airline participates in PreCheck, and you gave the airline your Known Traveler Number). As for whether it's worth it, that's a matter of personal preference.
The CLEAR Travel Experience
CLEAR speeds you through the long line for ID check, and guides you to the screening line.
Enrolled in PreCheck? We’ll provide you with fast access to PreCheck screening for eligible flights.