Twitter beat Facebook to the punch, announcing last month that it had added the ability for iOS and Android users to add alt text to images in tweets, Susan Schreiner, an analyst at C4 Trends, pointed out.
“There seems to be a general movement towards making technology more accessible,” Schreiner said. “I think people are recognizing the great opportunities. There are close to 250 million people around the world with visual impairments and almost 40 million who are actually blind.”