RunCalc web application has a new option: illustrated set of warm-up and stretching exercises. Joints warm-up and dynamic exercises are recommended before training, stretching - afterwards. You can use buttons to control exercise time. Application shows the time and plays sound at the beginning and at the end of each exercise.

RunCalc Android version redirects to this option of web app from main menu Warm-up. In May you can test this option without registering (link).