AliPrice - AliExpress Price Tracker app lets you track the price history of any item from many online retailers like AliExpress, Daraz, and Amazon, etc.
RetailMenot - The RetailMeNot mobile app allows you to find deals on the go for both online shopping and in store shopping.
PriceGrabber - Get the lowest prices on computers, electronics, furniture, cameras, clothes and more.
Honey - Honey is a browser extension that automatically finds and applies coupon codes at checkout with a single click.
Price Tracker for Amazon - Price Tracker for Amazon is a shopping app that allows you to browse for favorite products from famous online stores know as Amazon for a better price.
Slickdeals.net - Slickdeals: The Best Deals, Coupons & Discounts on everything