Traffic Time - Fast ETAs

I’m confused about how this app obtains commute times as they are often incorrect. For example, I open the app today and it tells me the commute home will take 1 hour and 1 minute. I then use the directions option provided by this app which opens the exact same route home in Google Maps, but GM states the commute will only take 40 minutes. Based on the traffic displayed, 40 minutes is a much more accurate estimation. The traffic would need to be a record level of terribleness to take more than an hour. Why is this app’s estimation so inaccurate?

I make sure I pop into it each morning before I drive and it tells me if anything weird is going on. I set up a couple of addresses along the way to help estimate commute times.

I put this app on my swipe left screen so I can quickly see how long it will take me to get to my favorite places. Use it almost daily now.