LOGFIRST is a solution to the hassle of tracking your business driving mileage. The LOGFIRST app, tracks all of your trips and then helps you to easily classify them into business, personal, commute, or whatever other category of trip that you prefer to track. The magic is in the "Auto-classify Function" which learns from your previous trips and can help you efficiently classify new ones.
Continued use of GPS running in the background can dramatically decrease battery life.