Ritu Soni Srivastava, who launched ObiNo, a mobile weight loss coach, in August last year believes people have an idea of what to eat and how to work out but need someone to guide them. “Coach apps do just that, they hold users accountable for their health,“ she adds. Developers say that such apps appeal more to people who have already consulted nutritionists and trainers and understand the basic difference between good and bad health choices.