EDF UK is a free app developed by EDF Energy PLC, available for iPhone users. The app is designed to help users manage their energy easily and efficiently. With this app, you can register or log in to your EDF online account quickly and securely using Face ID or Touch ID. The app allows you to switch easily between your accounts or properties, check your account balance, payment and tariff details, view your bills and payment history, and receive notification alerts and reminders.

In addition to these features, the app lets you make payments instantly, submit your meter readings, view messages and documents that EDF has sent, renew or change your tariff, and share your unique referral link with friends. The app also features Energy Hub, which provides a breakdown of your energy usage and costs, and personalized tips to help you save energy and money. If you have a smart meter, you can also use the Pay As You Go feature to check your balance, top up your meter, set auto top-ups, or receive low-balance alerts. However, the app won't work for traditional prepayment meters that do not allow online top-ups.

Overall, EDF UK is a useful app for iPhone users who want to manage their energy consumption and payments easily and conveniently.