RaceQs is a free tracking and performance App available for iPhone/Andoid that records your race track using the built-in GPS of the phone and then allows you to upload the result to their servers for post race replay. If others in the race also use RaceQs, you can replay the entire fleet. Great for post race review and/or training if you put it up on a big screen in the bar.
There's also a (currently free) Beta program which allows you to synchronize footage from an action camera with your GPS track in your raceQs 3D animated replay.
However, ther's no user forum on the website and their FB page doesn't allow comments so I thought I'd post the issues here to illustrate why they need a forum.