Mercury App is a free utility tool available for iPhone users that provides easy access to My Account and enables you to track your energy usage. The app is developed by Mercury NZ Ltd., a company that promotes renewable energy, and offers its customers an opportunity to earn rewards. The app offers more ways to earn points, such as step-challenges that track your steps using the Health App. You can redeem the points earned for Free Power Days. However, terms apply.

To use the app, you need to be a registered Mercury customer. If you are already a customer, log in using your My Account details. If you are not registered for My Account yet, you can do it through the app or the website. If you are not a Mercury customer, you can join today by calling or visiting the website. Once you have registered, download the app and start using it to track your energy usage and earn rewards.