Twitter adds tools for photo sharing


SAN FRANCISCO — Twitter Inc. has introduced tools to adjust the color, size, and style of photos uploaded via applications for iPhones and Android phones, as the social-media site adds features to compete with Facebook Inc.’s Instagram. Twitter is letting users add pictures, video, and audio to their postings

The photo filters, developed in partnership with software maker Aviary Inc., are part of an update to the mobile apps made available Monday, San Francisco-based Twitter said in a blog post.