iSail Pro HD app for iPhone and iPad

This application allows you to have the best position of the boat and the best timing before you start a race.
You can set the timer for 10 minutes, 5 minutes, 4 minutes and 1 minute. App also warns you by voice on the important moments.

During the race, this application calculates your position between competitors according to the ratings of them. You can add and remove the ratings of your rivals manually in your application.

This application is also enables you to enter nicknames and share the position, angle and speed information between you and other boats.
Position, angle and speed informations are changed instantly.
To increase the battery performance you can update the informations instantly or regularly.
To get all that informations you need internet connection.

Continued use of GPS running in the background can dramatically decrease battery life.