A two-year-old app is helping women in Asia's largest slum, Dharavi, to stand up against domestic violence. The Little Sister app, working in 3 languages, is helping women report instances, however small, and get help. Home to a population of over one million, Mumbai's Dharavi sees many such cases, say the women who are part of the initiative started in 2014 by a non-profit, SNEHA – the Society for Nutrition, Education and Health Action.