Interview nerves are bad enough without adding "am I going to be late?" on top. A backward plan takes the logistics off your plate. You know exactly when to start reviewing notes, when to get ready, when to leave. The only thing left to worry about is the interview itself.
Showing up 5 minutes early and calm makes a different impression than showing up on time and flustered. The difference comes down to whether you left enough time for each step before the interview. Review your notes, get dressed properly, account for traffic or transit delays, and arrive with a buffer.
Set the interview time as your deadline. Work backward: arrive 15 minutes early, travel time, getting dressed, reviewing notes and practicing answers. Ready Time sends you a notification for each step. When the first one fires, "start reviewing notes," that's your only cue. Everything else follows.