PRO version from Trip tripmeter all features are in use with out limits on this PRO version.Trip meter for daily use and fuel ecology mode shows you how much fuel. Helps you save trip cost!Easy to use application for measuring traveling distances and expenses. Trip PRO is using GPS or OBD-2 EML327 Bluetooth module for measuing distance and speed.Basic features can be used with out OBD2 also. See feature list at bellow.Features with GPS and OBD- Measuring Trip distance with GPS or OBD- Works in background during phone calls- Distance in either metric or imperial units- Travel time- Four ajustable tariffs- Speed display while driving- Average travel speed- Send travel history to e-mail- Name trips in history view- GPS distance calibration if neededFeatures with OBD2- Trip PRO supports EML372 Bluetooth OBD2 for reading data directly from ECU- ECO - light Gree, Yellow, Red- Show fuel use L/100km- Warning sound for fuel economy- Engine RPM and Coolant Temp- OBD Measure calibrate possible if needed- Remember last selected Bluetooth device- User can modify what information is shown on front screen (ECO, L/100km, Temp,RPM)