TriZones is the the triathletes best friend when it comes to getting more out of your training. In just a few clicks you can set up accurate zones for all metrics run all of your sports, and watch as your workout quality increases. The app uses scientifically proven formulas for calculating zones based on your personal information, allowing it to provide personalized zone distributions that are ideal for you. As you improve, you can enter your updated training benchmarks for up-to-date zones.