The Amazon Appstore for Android temporarily marked down 10 popular Android apps on Friday as part of a "Greatest Hits" deal that celebrates its second birthday (or first in the UK).

Amazon discounts sometimes popular and sometimes not-so popular Android apps in a daily Free App of the Day deal, but today's celebration deal is a little different. Amazon is offering 10 of its most popular Android apps free for a limited time.

Read: Amazon Android Appstore now accessible through browsers in UK

The free apps include Cut the Rope, SwiftKey, Angry Birds, Shazam Encore, World of Goo, CalenGoo, Jamie Oliver’s 20-Minute Meals, Paper Camera, Sprinkle, Drawing Pad, and the Kindle edition of PAC-MAN HD.

The pricier titles are Jamie Oliver’s 20-Minute Meals, which is usually $8 (£5), Shazam Encore, which is usually $5 (£3), and SwiftKey, which is usually $4 (£2). If you download every free app featured in the deal, you would save $36 (£23) total. Not too bad, eh?