Originally Posted by
one4smoke
What are some of the primary reasons for that?
Well for me a dedicated computer is smaller, better water resistant, better suited for the job. Also I can save the phone battery for emergencies and not have the phone in a rather dangerous location should something happen.
I used to use a iPhone as a bike computer, but if I kept the display on I would be lucky to get 3 hours on it. I often go for rides longer than 3 hours so was also powering it with a usb battery. The touch screen was less than ideal for an interface and the display was easily washed out in bright sun.
Dedicated bike computer easily gets 10+ hours on the battery, the display works great in bright sun. Works with more sensors (ANT+). Smaller so I don't have a huge phone hanging off my handle bars.