If you're into sport and have an iPhone, RunKeeper - an application that will let you keep track of your workouts - might be the app for you.
Despite the name, RunKeeper actually handles a variety of sports - from walking to skiing and skateboarding to wheelchair sports. There's even an "other" category in case your sport doesn't fit in. Once you choose the activity, hit Start Activity and RunKeeper will begin to monitor the workout.
RunKeeper uses GPS to track your progress, so it needs to be enabled. Using the data from the GPS, it will tell you how far you've gone, how fast you're going and how many calories you've burned. You can pause the workout, and when you're done, enter notes on how it went. You'll also be able to view your workout on a map by pressing the map icon to the left of the total distance display. Just a word of warning: give RunKeeper's GPS function a few minutes to fix location before starting, or you could end up with an inaccurate reading.
RunKeeper also keeps a record of all your workouts, so you can look at them later. The application gives you the option to register for a RunKeeper account, but it doesn't really explain the benefits. You can use the app without registering for RunKeeper Pro, but some of the options, such as posting to Facebook and Twitter will not be enabled in RunKeeper Free.
RunKeeper is a good app for keeping track of distance, time and calories when working out, but for the best functions, you'll have to register.