A product can be better viewed on the big screen of either a desktop or laptop.
I take final decision to buy a product only after viewing it in all angles on the big screen of my laptop.
While at home, I prefer to use laptop only. It is 100% unwise to drop desktop version of any online shopping website.
Mobile is useful only when we are being mobile out of home.
So, I firmly believe the Flipkart website is much better than App experience.
If u want real analysis of how flipkart was used, you could have taken a survey from the people who were shopping at your site and should have made a better decision and what has decided that "lets shove this useless app down all the consumers throat" . back when Flipkart was available on PC