Egg Timer for WP 7 is an interesting app for all those who would like boiling eggs quite often.
This app will help you cook eggs to your favorite recipe. Want soft-boiled or hard-boiled eggs? Choose the egg size, starting temperature, recipe – and start cooking. For accurate calculation of the cooking time, specify the height above the sea level at your location.
The app also has a special GPS-based feature that automatically determines your current height. If you like a recipe, you can add it to your list of favorites – so if you ever need to cook to this recipe again, just tap it on the screen and start cooking.
Download the app for $0.99 from windows phone 7 marketplace.