We have been doing time trials every week now for months and one area we have been wanting to improve on is the method of timing. Our volunteers have done a fantastic job and all times posted are accurate as we have always used at least 2 watches as a back up system.
Timing chips are incredibly expensive and I came across this app for the iPhone or iPad that worked really well for us. The volunteers do not have to know all names now. We just pin a number card on each paddler. It worked really well and though we did not use it fully tonight you can even accurately time the splits of the racers when doing a BOP time trial. Check the vid out. I have no affiliation with this.
App is called Race Splitter