If you drive your personal vehicle for work and have to turn in mileage reports, this app is a must-have. MileIQ tracks and records your drives and logs them, calculating the distance and value. When you're looking at the report and notice that the app logged your drive to lunch or to the ballgame, swipe left to classify it as “personal”. The app automatically creates a mileage log that's compliant with the IRS (calculating at 57.5 cents per mile), you can add tolls or parking expenses, then export the data as a spreadsheet or PDF.
THE DOWN SIDE: The app uses your phone's GPS to calculate your trips, which uses more battery life...but the company says GPS use is minimal and won't be the constant drain that a navigation app would be. Also, you only get 40 free drives per month...you can upgrade to $6 per month for unlimited drives (the company notes, an 11 mile drive earns you $6.16 worth of deductions, which covers the cost of the app).