Introducing a cool new app JogRunSprint Description JogRunSprint is a new and exciting app based on the popular running concept "10-20-30" developed by professor Jens Bangsbo and Thomas Gunnarson from the university of Copenhagen (http://www.ncbi.nlm.nih.gov/pubmed/22556401). Experience incredible results in just 3-4 weeks of running with JogRunSprint...Even as an experienced runner. A group of veteran runners who followed the training for just 7 weeks improved their 5K times by 4 percent! JogRunSprint makes it very easy to run 10-20-30 intervals. Set up how many sets you would like to run and press start. Visual and audio cues will guide you through the entire exercise. Remember the importance of a proper warmup before starting your exercise. We recommend warming up with easy jogging for about 10-15 minutes with an increase in speed the last couple of minutes. Get Fit, Get Faster - Enjoy your run! "Runners World: New Workout - The 10-20-30 Produces Impressive Results" http://bit.ly/18x9Qv5 "Mens' Health: Run Faster - The Fun Way" http://bit.ly/JztB9A Continued use of GPS running in the background can dramatically decrease battery life. Download free from Itunes : https://itunes.apple.com/us/app/jogrunsprint/id738529550?ls=1&mt=8 Requirements: ios 7.0 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimized for iPhone 5. I recommend you to download this free and awesome app. Enjoy!!