Circa is not your typical newsreader. Instead of showing you entire articles from various publications, it presents you with a collection of details about a story: quotes, pictures, facts, and other snippets. If you follow a developing story, Circa can notify you about it.
The app reminds me of a story about Mark Zuckerberg and his art history exam at Harvard. Having not gone to any class that semester, Zuckerberg decided to create a web page with various images of art that would be covered in the test. Then he emailed his classmates asking them to fill out a description for each picture. And of course, they all did. How did Zuckerberg do? He aced it.