The popular MyFitnessPal web service is now available on the Windows Phone 7 platform.
Touting itself as the best calorie counter on Windows Phone, the app lets you set a daily calorie goal, then record your daily food and exercise to make sure you stay on track.
The app gives you full mobile access to your MyFitnessPal.com account, so you can log your food and exercise from anywhere, at any time. All changes made on your phone will be synchronized with the website and vice versa.
The software is completely free and can be found in Marketplace here.