The Costco mobile app can help you save more money and time. Here are three useful app features you may not know exist.

However, you can use a Mastercard or Discover card at Costco.com and via the Costco app. If you prefer to shop in-store at Costco with a credit card, then make sure you have a Visa-backed credit card.

Learn more about how to redeem Costco credit card rewards. In comparison, other credit cards allow you to redeem rewards online or via a mobile app, typically within one billing cycle of earning them.

Many retailers, including Costco, have mobile apps you can use to make your shopping experience better. If you're a Costco member and have yet to download the Costco mobile app, now is an ...