Amazon is turning its regular Free App of the Day sale into a three-day event worth up to £150.

The online retailer said it will make 40 apps and games available to customers completely free from 24 December to 26 December. A few of the more popular apps include Angry Birds Space, Colin McRae Rally, Worms 3, PicShop, Oxford Advanced Learner's Dictionary, and Plex.

As part of the sale, Amazon is highlighting a Christmas app bundle and New Year bundle. The Christmas one includes games like Sonic the Hedgehog 2, COGS, and the Construction Simulator 2014, while the New Year's one features Djay 2 and TuneIn Radio Pro.

The Amazon Appstore is an app store for the Android operating system, though it is operated by Amazon rather than Google. The apps are compatible with both Amazon Fire devices and Android tablets and smartphones.

You can see the full list of on-sale apps at the Amazon Appstore. For more holiday sales and discounts, check out Pocket-lint's Boxing Day sales round up.

READ: Boxing Day sales 2014: Best deals and sales in the UK