I am happy to see that we have worked out a cross link agreement and this thread it active again. Here is a photo of StartLine
running on a Nexus-One phone.
Some questions came up on the best way to use this app. Looking at this display for an example. You want to do a modified Vanderbilt start. You decide that you want to start 9 seconds from the port pin. You set up by getting your boat near the desired distance from the layline and head away from the line. You adjust your heading to stay 9 seconds from the layline. You know, from a practice run that it takes 15 seconds to gybe and accelerate so when you see the time to burn read 15 seconds you start your gybe and head to the line. This is the start that the winning America's Cup Regatta boats used in the fleet races. They started way away from all the other boats that were all waiting near the line and hit the line at full speed at the gun.
The advantage of this strategy is that you set up well ahead of the start so you can get in position without killing time at the last minute. You arrive at your position on the layline and it doesn't really matter if you are early or late as you will be sailing away from the line until your time is right and in doing so you are still set up perfectly for your desired start. This is just one of many possible strategies, all of which will work.