Loop either reads data from your Smart Meters or gets data from a small clip that you place around a cable in your meter cupboard.
If you have a Smart Meter, you can create a Loop account at loophome.app/signup, give Loop permission to read from your Smart Meter and then start using the Loop app. The Loop app helps you understand how you use energy, how you can use less and provide personalised advice such as whether solar panels or a home battery would make sense for you.
Before we added Smart Meter compatibility, we sold Loop Clips. These devices made mechanical meters smart by clipping round a cable in the meter cupboard and sending usage data directly to Loop. Accounts with a Loop Clip attached continue to work but we have stopped selling these devices.