Former chief minister of Karnataka HD Kumaraswamy has turned angel investor for a mobile-based cabhailing venture in the city. Come Ugadi, Bengaluru could see the new cab aggregator, HDK Cabs, rivalling Ola and Uber. The app comes in the aftermath of prolonged protests by disgruntled drivers associated with Ola and Uber. Apparently, HDK Cabs plans to charge a fixed fare through day and night.