Truecaller, an app that helps users screen strangers and robocallers, will soon allow users in India, its largest market, to borrow up to a few hundred dollars in the nation. The crediting option will be the fourth feature the nine-year-old app adds to its service in the last two years. So far it has added to the service the ability to text, record phone calls and mobile payment features, some of which are only available to users in India.