How to add a device to your account

Log into your Nielsen Computer & Mobile account using your credentials.
Click on 'Add/Remove Devices' and then 'New Device'.
Select the type of device you want to register between smartphone, tablet and computer and then click on 'Next' and complete the registration.
The Devices page will now show the new device you have just registered.
To install onto this device click on 'Install the App' and then follow the instructions on the screen.

Please see below screenshots for reference:

How to remove a device from your account

Log into your account using your credentials
Once you have logged in click on Add/Remove
Devices, on the next page you will have a list of all the devices (Computer/Mobile/Tablet) registered to your account.
Select the old device and click Edit, at the bottom of the new page click on the remove button and confirm your choice.

Please see below screenshots for reference: