VR Tourviewer is distributed through an Oculus Release Channel (background information).
You can get access to VR Tourviewer in the Oculus Store by submitting the email address that’s linked to your Oculus Account.
You’ll then receive an invitation email from Oculus for the VR Tourviewer release channel.
After you’ve confirmed the invitation from Oculus by clicking a link in the email, you can find the app in the Oculus Store under ‘Preview Apps’.
The ‘Preview Apps’ can be found in the Oculus Store in VR when scrolling all the way down.
Note that it sometimes takes a few minutes after confirming the invitation before the app will be visible in the Oculus Store.
You can use multiple devices with the same Oculus account/email address, you only have to sign up once then.