This is a 2 part question:
I have concerns over the general accuracy of a GPS device to calculate speed. Mainly because I will be using the device in Eastern Europe, and not sure on the accuracy of the coverage.
Because of this concern I was thinking of pairing an android based gps app to wireless sensors mounted on the wheel, much like you would do with a Garmin 800.
I'm looking for the following reply:
Is my concern justified, or will a phone based GPS be accurate enough to give me a realistic speed indication?
If my concerns are justified, can you recommend some ways to pair the wheel sensors with apps?
What general features should I look for in a phone to bring out the best of it for use as a cycle computer / gps.
Thanks in advance!