Display official Pocket Instapaper and Readability buttons to your posts/pages.
Apps like Pocket, Readability & Instapaper are used by tens of millions around the world, especially to save long and captivating articles to read it later offline. Usually, to save an article from a mobile device, you have to click three times. (The Menu button, then Share button, then Add to Pocket, or any app you use). In the long run, it's painful for users. And if it's painful for users, it's not good for your blog.