You absolutely have to get Capital One Shopping! I've used it for forever and it is literally amazing for tracking Walmart prices! Usually I'm super picky about what I install on my computer cuz of security stuff but this one is legit and very safe. Its completely free on Chrome and sends you alerts the second a price drops! I honestly love it so much because I saved a ton on my last TV purchase... seriously the best feeling ever! Just add it to your browser and it does all the heavy lifting for you. It is super straightforward and perfect if you are on a tight budget like I usually am. Good luck!