Ladies, what are the best couponing/mobey reward apps that you use?😀

I recently got into couponing 😊 I've downloaded several apps to start with on my couponing journey such as Walmart, Crazy Coupon Lady, Dollar General, Flipp, ect. I'm curious as to what you ladies are using and if y'all have any helpful advice or tips! Thanks in advance! 😁😁