app idea

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http://forums.androidcentral.com – Hi..not sure if this is a good place to post this, so let me know if I'm in error. I searched to see if an app like this existed and can't find one. Its a geeky idea, but it would be interesting if one could see their relative speed to their destination. For example, you are heading home and going 60mph on the road, but the road does not go straight to your house. Nonetheless you are getting closer, but not at 60mph. The app would calculate the speed you are actually going directly towards your destination, which would be less than your road speed. It could even be a negative number. (HowTos)