ISmoothRun is a comprehensive and easy-to-use mobile app that provides a comprehensive suite of features to help runners maximize their speed, endurance, and overall performance. It provides real-time and historical data tracking, including speed, distance, time, and elevation, as well as audio coaching to help runners stay motivated and on pace. It also offers a variety of customizable training plans, a social media component to connect with other runners, and analytics to help runners analyze their performance and make adjustments to their training plans. Additionally, ISmoothRun offers goal-setting tools, badges to help encourage users to reach their goals, and a range of fitness challenges.
none is apparently good at tracking heart rate in REAL TIME.