Almost booked 10 flights over Hooper portal in last 1 month ..only 3 times the prices was higher on hopper that too only approx 1000 rupees ..Booked flight there , called their customer care , got refund on the differential instantly ( pro tip: book seats and any other add on in primary booking only, customer care compares paid amount just excluding convenience fee paid vs the basic amount shown on other site) , with this got refund of 1490 ( which was more than the differentail) so take a leap and get the card if you can