I was a loyal Lyft rider until I noticed it charged me more than my partner for the same trips

After noticing price differences between her and her partner on Lyft, one customer decided to take public transit more often. : Jeffrey Greenberg/Universal Images Group via Getty Images Prices can vary on ride-hailing apps, even for the same ride, a recent study found. One rider said she figured it out herself after comparing prices for Lyft rides with her partner. Now, she's relying more on public transportation, including to commute, she said. This as-told-to essay is based on a…