The $5 PriceWatcher (Mac App Store link) helps you monitor all kinds of great online deals right from your desktop.

The app allows you to find a product or service and automatically check its price on several popular online stores like Amazon, iTunes, and Booking.com to help you find the best possible deal. You can even set it up to monitor things while you’re away, and notify you of price drops via e-mail, or show you a historical chart of price changes over time.


Source: Mac World

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