Boiling an egg just the way you want it does not have to be challenging. There are plenty of products you can pick up to help you out. The Egg Perfect Egg Timer is a simple tool that calculates cooking stages by temperature and reacts to heat just like an egg does. It adjust for the number of eggs and the amount of water you have. The Egg Perfect Egg Timer has been calibrated to show soft, medium, hard, and stages in-between. Not too expensive either.