I've used a few different running apps, but the two best are Runkeeper and MapMyRun by far. Those two I've created accounts with and have used to track my progress.
Between just those two apps, when I've used them to track my runs, I've run 163.48 miles. This isn't counting the running for women classes or the first two months of my running when I first started.
Even though there have been breaks, I'm still pretty proud of that, seeing as how that's probably 100 times more than I had ever run in my adult life before July of 2011.
I expect to break 200 before April is out, but that's only if I record my workouts. I kind of like being able to keep a record. The races are a bit easier; I've run 15k total. :)