This is an excellent and very well executed app. We have been testing this app here at theappwhisperer.com for several weeks now and it is fast becoming indispensable. Read our comprehensive review below and find out why this app needs to be on your device right now. Start Session Runtastic is a fitness coaching app for want of a better definition. It is not only for running, as the name may suggest, but can be used for a multitude of different activities to help you achieve your fitness goals. Whether these are related to interval or target pace coaching or distance and time or calories workout. Runtastic covers it all…