I have been riding for a bit and finally broke down and bought some shorts and gloves because my hands and rear end were getting sore from riding. I think they should make a big difference but now I am thinking I need a cyclocomputer to see if I can track any improvements. I haven't been really riding any set route I just drive around until I get tired so I don't know the distance, speed, or time (time can be estimated) I am doing. Is a computer really needed if you are riding to lose weight? Is there any good iPhone app to buy that will do the same? Any advice is much appreciated.