I am starting training for my first marathon in the spring. I am wondering if there is any free or cheaper alternatives to the Run with Hal Plus app. My schedule has to be coordinated with several other people's schedule in my family. I am not always able to run the same days every week. My long run will always be on Sunday, but Monday through Saturday could be on different days each week. I like that the run with Hal Plus app will adjust your training schedule according to the days that you are available and adjust from the results of your previous training runs. Has anyone used the Plus app for Marathon training? Is there any other app that has this functionality that is free or cheaper?