No one wants to face the regret of buying something online only to find it at a lower price later. Nor do you want to miss out on a big sale for a product you've been thinking of buying. That's where these price tracking services really shine. They'll enable you to comparison shop prices in real time, check pricing history, automatically apply coupons at checkout, and sign up for email alerts when a product drops below a price point that you set.

While there are a number of price tracking sites and web browser extensions out there, in our experience, these four are the best for ensuring that you know the ideal time and place to get the absolute lowest price.

For tracking price history on Amazon: CamelCamelCamel (aka The Camelizer)

Are you looking to save cash on your next visit to Amazon? If so, take a look at CamelCamelCamel, a powerful website that monitors and tracks prices for both new and used items listed on Amazon.com. The easy-to-read charts show price history goes back six months or more, offering plenty of perspective on price trends directly from Amazon and also by third party sellers, for both new and used product.

To use CamelCamelCamel, just find an item on Amazon, copy the URL in the address bar, and paste it to the search bar on CamelCamelCamel. Or, download the Camelizer browser plugin (for Chrome, Edge, Firefox and Safari) that lets you do the research directly on Amazon by clicking on the Camelizer icon in your browser bar. Either way, a comprehensive price history of pretty much every item sold on Amazon is right at your fingertips, and you can set up email alerts to notify you when prices drop.

And be sure to check out tips on the six pitfalls to avoid when shopping on Amazon.

For real-time price comparisons across multiple sites: Invisible Hand

While Amazon has great deals, they don't always have the lowest price. The Invisible Hand browser plugin (for Chrome, Edge, Firefox and Safari) searches for deals in real time as you browse for products, so you can see the price on multiple sites at the same time. For example, if you're browsing on Walmart, you can see prices on Amazon, Target, Newegg and more. Invisible Hand will show you the base price and shipping charges, so you can make a fully accurate price comparison. Invisible Hand will also give you applicable coupons, saving you even more money. 

Since Invisible Hand searches in real time, you may need to exercise a little patience as the page loads. If you're not happy with the price you're seeing, you can click on the "Add to Price Alerts" button and create an Invisible Hand account to receive price alerts.

For finding coupons when you check out: Honey

You'll never forget to apply coupons when you install the Honey browser extension (available for Edge, Safari, Chrome, Opera and Firefox). When you get to the checkout page of a merchant site, Honey will automatically find and apply known coupon and discount codes.

Honey works with more than 40,000 shopping sites, and you'll know when you're on a site that works with Honey when you see the "h" button turn orange on your browser toolbar for Edge, Chrome, Opera and Firefox or "h" logo to the left of the address bar with red numbers in Safari.

Honey also lets you easily track price drops. Honey will show you when shopping on Amazon, Overstock, Target, Walmart, J.Crew, Saks Fifth Avenue, QVC, American Eagle Outfitters, Kohl's, Best Buy, AliExpress, you can choose to add products to your Honey Droplist. When adding an item you can select the maximum price you want to pay and the period of time you want to track the item. You'll get an email when the price drops to below the price you set.  

Honey offers a free rewards program for shopping with the Honey browser extension at more than 4,500 sites. Once you've earned 1,000 Honey Gold, you can redeem it for cash on PayPal or get a gift cards to 26 stores including Amazon, Nordstrom, Nike, App Store & iTunes, Uber, and Home Depot.

For saving money on past purchases: Earny

Most price-tracker apps focus on helping you determine when the right time to buy an item is. But just because you’ve already bought an item doesn’t mean your opportunity to save money is over. Shopping assistant site Earny helps keep track of your spending history, alerting you if it discovers you’re eligible for a price adjustment.

Earny scans your email (including Gmail, Microsoft and Yahoo), automatically keeping a browsable database of your online purchases and emailed store receipts. If an item you’ve bought at one of their covered retailers drops in price, Earny will automatically let you know. Covered retailers include Best Buy, Bloomingdale's, Costco, the Gap Group (Gap, Banana Republic, Old Navy, Athleta), J. Crew, Kohl's, Macy's, Nike, Nordstrom, Target, Zappos, and Home Depot.  Earny also offers Cashback on purchases from select sites, including Walmart, Sephora, Honest, Bark Box, Warby Parker, and The Vitamin Shoppe. When you have the Earny browser extension installed, you can see the percent cash back on supported sites. And for those that shop on Amazon, Earny will track track your shipments and get you money back when your deliveries are late.

If you are concerned about Earny having access to your email account, you can create a separate account that you use exclusively for online purchases. 

Earny costs $19.99 per year, so you'll need to calculate whether you'll make that up in Cashback and price drops. 

[Image credit: price cut concept via BigStockPhoto]

Updated on 10/14/2021

For the past 20+ years, Techlicious founder Suzanne Kantra has been exploring and writing about the world’s most exciting and important science and technology issues. Prior to Techlicious, Suzanne was the Technology Editor for Martha Stewart Living Omnimedia and the Senior Technology Editor for Popular Science. Suzanne has been featured on CNN, CBS, and NBC.