Originally Posted by
Urthwhyte
An iPhone, Android, S60, or $smartphonePlatformOfChoice doesn't hold a candle to a dedicated device like the Edge or Forerunner series when it comes to serving as a bike computer. I personally use a Forerunner 305, and compared to carrying my 200+g phone strapped to my arm or in my rear pockets it's leaps and bounds better. Get the 705, you won't be dissapointed
iMapMyRide is GPS based and is accurate over 40kms to 100m compared to my VDO computer which I measured the tire precisely. I use my bike computer to see my speed at a glance. If I want to see where I went I use iMapMyRide.
Smartphone GPS works just fine.