Fun Run is a great application for anyone looking for a good training helper for running a 5K or 10K. Four programs are included. Beginners can start with the Couch to 5K 9 week system or the Couch to 10K 13 week system. More ambitious runners can try the 6 week Couch to 5K program. Runners who have completed the Couch to 5K system can continue with the Boost to 10K system.