When you subscribe to Viva Premium in your Herald app you will be prompted to create an NZ Herald user account or sign in to activate your subscription on the viva.co.nz website.
If you missed this step when you purchased in the Herald app, you can link your subscription following the below steps:
1. Open the Herald app
2. Tap the profile icon in the bottom navigation
3. Sign in
4. Scroll to the Premium tab in the profile section and tap 'Link Premium Account'
5. You will see a message telling you this has been successful, and you can now sign in on viva.co.nz to see Premium content on your other devices