This is a free version of a paid app, so you can try it and upgrade if you find it super useful. Endomondo is both an app and a website for "community based GPS tracking of sports." What does that mean? That means it's a jogger and hiker's best friend, but it's also great for interval trainers, skiers, and just about anyone who wants a good app for social and collaborative exercise.
If you're into Facebook bragging, you can add your workouts to your timeline. If you're not, just register for an account using your email.
You can map where you were and how long your workout was. You can sync data with appcessory devices like heart rate monitors and the Fitbit while pulling the GPS and workout intensity data from your phone.
Endomondo also gives you a lot of ways of viewing your data through maps, calendars, and lists. If you need inspiration, you can find challenges and lists of local events.
Ok, this isn't an exercise app. It's a bit of the opposite. This is an app designed to help you when you or your kids are not feeling so well and you can't decide whether or not to get medical attention. Do I need to see someone about this rash? Can it wait until morning, or should I go to the ER? If I need to get medical attention right now, where's the nearest place I should go?
Here's an example. My husband stepped on a rusty nail while out on a farm. Does he clean it off with some water and rubbing alcohol and then take it easy for a couple of days? Does he go in to the doctor's office the next morning for a tetanus shot and confirmation that he doesn't need stitches? Turns out the answer is that he goes into the ER and gets started on antibiotics immediately. Foot wounds are not something you mess around with.
Now where does this fit with fitness apps? If you're working out outdoors, you want something to tell you whether or not that rash looks like poison ivy and what the symptoms of a pulled muscle are compared to a broken foot. Just in case. If you never use it, consider yourself lucky.