The Indian government last year revealed that Reliance had entered an agreement with Shein under which Indian manufacturers would supply products under the Shein brand.
Shein makes a comeback to India after five years of ban Shein to sell garments as low as £3 in India.
Reliance will pay a licence fee for using Shein's brand name, said the person with direct knowledge of the matter.
Reliance Retail launched the app over the weekend, Reuters reported, citing a person with direct knowledge of Reliance's launch plans.
Shein has entered a long-term licensing deal with Reliance to sell products manufactured and sourced in India, according to BBC.
