I drive my Niro part time for both Uber and Lyft and have used the following apps. Hurdlr, Mile IQ and Quickbooks Self Employed. Mile IQ is great for just keeping track of mileage. Hurdlr and QBSE are great for both mileage and tracking income and expenses and estimating quarterly taxes. Hurdlr is the only free app but has a paid option to unlock more features.