It's also worth noting (as others have intimated) that showing Blink's (or other pharmacies' lower Rx cost) may persuade your pharmacy to match the price.
I prefer to buy from an independent pharmacy (I've lost count, but I think there are 17 plus Walgreens and Rite Aid within 1/2 mile of my home.), but when I tell the pharmacists how much Walgreens charges me with my GoodRx coupons they just shake their heads and tell me to go there.
I don't know how they do it, but GoodRx's prices are simply waaay to low for others to match.
Edit: The independents will match Walgreens
regular prices, but not the GoodRx prices.