Install the latest version of Sum Idea and you'll discover a new feature for your Messages app - an awesome new sticker pack, chock-full of fun-filled Sum Idea characters.

You'll be glad to hear that your sticker pack is FREE and is automatically available to brighten up your iMessages when you download Sum Idea from the App Store.

If you've not hit upon Sum Idea yet, you'll also pleasantly discover an one-of-kind, deceptively straightforward logic number puzzle that will challenge your brain power and exert your lateral thinking.

Sum Idea was featured in the 'Best New Games' category on the Apple App Store in 115 countries and was a TIGA Games Industry Awards, 2015 finalist. Learn more about the game by visiting the Sum Idea information page.

If you need any help using the new iMessage stickers for iOS 10, The Verge's guide - 'How to use iMessage's new features, effects and stickers' is a great source on how to get the most out of iMessage and impress your friends.

SUM IDEA is available to download and play for free from the iTunes App Store.

Have fun!