mLog utilizes a small amount of cellular data to verify the accuracy of street addresses and backup your trips and mileage to the cloud. Receiving GPS signals does not consume cellular data.
If there are concerns with cellular data usage, users can disable cellular data for mLog, which requires the mLog to sync data through a WiFi connection the next time the mLog is opened. This could lead to diminished user experience.
The driving terrain or location will not affect trip or mileage capture. mLog utilizes your device's GPS technology, which means the trip accuracy is based on the limitations of the phone's capabilities.