Who can purchase/download Apps?
Only Business Catalyst Partners can install admin apps.
This means that if you do not have access to a Business Catalyst Partner Portal with the email you are trying to purchase an app from you will receive the following message when trying to login to select your website:
"You need to be signed in as a partner to install this app on your sites. Please sign out and re-sign in with your partner account."
If you are getting this message, contact your Business Catalyst Partner in order to install the app