Showing "Continue Reading" button to expose remainder of content

I saw another site ( that shows a "Continue Reading" button after 3-4 paragraphs, but ONLY when viewing on a mobile device (see file). The idea is to display the related content below the post. The reader would click to read the rest of the article BUT NOT "pay" to read it. I know you have the "Pay for Like" plugin but can it do what I've described?