eCOMPOSITE today released their new version of 321Run, the iPhone running coach. With a focus an simplicity and ease of use, this new version brings custom trainings, extends heart rate monitoring support and helps you take control of your outdoor activities. 321Run 3.0 brings a nicer, richer UI that is also more clear to the user. With less tools and buttons, the focus of the app is on recording, training and viewing your past runs. Graphics have all been updated to Retina Display, even maps.