Originally Posted by
lphilpot
I use Sports Track Live (on Android). In addition to post-ride data, I can view this onscreen (assuming I want to take the battery hit by having the phone display on constantly). This is while sitting in the house, but it's not too far off my actual ride numbers:

I know you CAN look at your phone while you are riding, but practically speaking, it's not a feasible option unless you have a generator hub and a power port. Either that or go for very short rides.