"India shops the most during this time of the year. With 75 percent of traffic coming via mobile, we expect this 'app only' sale to be the biggest shopping event of the year," Bansal, who is also Myntra's chairman, noted.

To avoid a repeat of the last year's chaotic sale, resulting in its co-founders apologising and admitting to inadequate preparedness, the company has worked to ensure a seamless shopping experience for its 50-million customers.

"We have opened new fulfilment centres across the country to guarantee efficient delivery. We have also ramped our technology and supply chain support to meet the huge customer demand.... We have also roped in our partner banks to give Flipkart customers exclusive offers during 'Big Billion Days," Bansal added.

The eight-year-old company claims to offer about 30 million products across 70 categories, including books, media, consumer electronics and lifestyle.

With 50-million registered users and 33,000 employees, the portal gets about 10 million hits daily and delivers eight million shipments per month.