iKeepActive

Create your workout calendar with iKeepActive! Sync to your Mac’s calendar which can then sync to your music player, phone or tablet.

iKeepActive is an integrated activity scheduling system which also interactively counts Calories. Not only does it help create your activity schedule but its primary focus is to make sure you do them by displaying reminders and follow-ups. You can also use it to log your diet, analyze your progress and visualize your results.

More info at http://ikeepactive.com/