There are three primary reasons why some trips could be missing. First, settings required to detect trips may have been changed. Make sure that your settings on your phone match those mentioned in the “Recommended Settings.” Even if one sensor is disabled, the accuracy of the app is affected. Second, there could be a delay in refreshing your trip history due to internet connectivity issues. After a few minutes, check again. Third, unreliable sensor data. Proximity to high-rise buildings, cell phone jammers or dead spots may cause this. To avoid incorrect analysis which could impact scores, the system automatically invalidates some trips to give drivers the benefit of the doubt. These invalid trips would not be displayed in Trip History.