If you buy tech online, you’re probably planning all your big purchases around big sales events like Black Friday and Prime Day, when the deals are obvious. It doesn’t mean there aren’t discounts throughout the year, but the search can be time-consuming, with offers either difficult to track down or from unreliable sources. Coupert is built to fix that.It works in the background while you shop, handling coupon testing, price comparison, and cash back automatically so you don’t have to think about it. With more than 8 million users and an average annual savings of around $600 per user, Coupert…