If mobile Feed Reader Apps like Flipboard or Pulse are not displaying any preview images for your blog’s feed, try one of these methods to get an image to display:
1. Set your RSS feed to display the full post.
This will mean any images you’ve included within your blog post content will be made available to be displayed by the Feed Reader for the preview. You can do this in WordPress in your ‘Reading Settings’ by selecting ‘For each article in a feed, show Full Text’.
2. Insert an image in your post excerpt.
If you don’t like the idea of displaying the full post in your RSS Feed and prefer to show only the excerpt, then make sure you have placed an image within each post excerpt.
3. Display your thumbnails in your Feed
If you don’t have any images in your post content, but you do have a thumbnail image for each of your posts, you can choose to make your thumbnails to appear in your RSS Feed. The post, ‘Show Post Thumbnails in Feed Content‘ at Digging into WordPress will show you how. (Please note, some apps may enlarge this image to suit their template which may result in blurry thumbnail images. Also, if you have other images in your post in addition to thumbnails, the preview image may not necessarily be the thumbnail you’ve provided).
I’ve yet to work out a way for a default image to display for blogs that don’t have images at all. Let me know in the comments if you know how.