Blog with limitations between paid users and visitors

Hello, I would like to create a blog with limitations to view content between paid and visitors users, is it possible? I would also like to notify users on their smartphones with each new post

you could add a yes/no field to the user datatype and call it ‘paid’ or something. and make it that if the user has purchased the paid plan, it is set to yes. then create a workflow conditions: if current user’s paid is no. then add the workflow action you want, like for example hiding the group or text containing the paid content, or showing a popup asking the user to upgrade or whatever you want.