We find this is the simplest way to ensure you can book a test on your preferred date. We have lots of devices available, but not an unlimited quantity. Using our devices as "Staff" means we can easily adjust availability of devices as required.

Just for simplicity. We don't know exactly when you will go to bed, so it's as easy to just call it 7.00 pm. The device will turn on automatically so this "appointment" time won't affect your study, no matter what time you go to bed.

It takes us a little time to get the device to your home using a courier service. Same day deliveries are prohibitively expensive and would double the price of the test. The appointment system prevents you from making a booking that we can't then fulfil, giving us time to ensure a reliable and dependable service to your door.