Apps similar to Keepa include Camelcamelcamel, which is free. Other options are BuyScout, Buyhatke, Reprice: Amazon Price Tracker and AmaDeal. There's no shortage of Price Trackers like Keepa, with more than 50 alternatives for the web, Android, iPhone, iPad and Mac.
Pricepirates makes on-the-go mobile price comparisons to eBay, Shopping.com and in its own database of products from over 36.000 online shops in Germany, Austria, Switzerland, the UK and the USA.
Germany
EU
Using Watch4Price you can compare "completely free" the price changes on Amazon (Italy, Germany, France and Spain) and eBay.
A simple, set-it-and-forget it price drop alert service that emails you when your favorite clothing staples go on sale in your size and color.
With Price Check by Amazon, you can use your iPhone to instantly compare prices at a real-world retailer with Amazon.com and its merchants, while on-the-go. Price Check enables you to search Amazon products quickly using barcode, picture, voice, and text search.
United States
Cross helps you find the best Amazon price in the world. Compare prices from all Amazon stores and get notified with the best other seller price.
Shop smart and shop fast at Shopzilla! Read reviews, compare prices, and get the right product at the right price every time.
Big Bang Price is the ultimate shopping app that helps you save big on your favorite products!
Set Amazon price drop alerts with ease. Our service tracks your desired products and notifies you the moment prices change. Straightforward UI. No sign-up or registration necessary. Unsubscribe in a click.
United States
PriceCute is a competitive price tracker for Amazon Sellers. Track your competitors' prices and get reports on them.
Italy
