The company held off preloading its App World store on many BlackBerrys until last year because some carriers wanted to highlight their own app stores instead.

WSJ: RIM, Carriers Fight Over Digital Wallet

The software firm says that while RIM is very supportive, it is too hard to make money on its call-logging application, which it sells exclusively through BlackBerry's App World store.

WSJ: BlackBerry Maker Hopes New Tools Lure Customers From iPhone, Other Rivals

Blackberry said it had secured more than 70, 000 additional apps for its Blackberry World app store including Skype, Angry Birds, Facebook and Whatsapp.

BBC: Blackberry 10 handset to launch first in the UK

As the Z10 goes on sale Friday, BlackBerry 10 boasts it already has 100, 000 apps on its BlackBerry World app store, including popular names like WhatsApp and Angry Birds.

FORBES: BlackBerry Seeks Love Again As Z10 Launches Stateside

BlackBerry App World, its online store, has about 100, 000 apps, compared to more than 700, 000 each for Android and Apple.

CNN: With BlackBerry 10, struggling phone maker eyes comeback

Today, app store users around the world are going to have their moment in deciding whether the Angry Birds phenomenon was a flash in the pan or a slightly longer, sustained fire in the pan.

FORBES: Angry Birds: Space Launches Today. Can It Keep Rovio on Top?

The iTunes Store is the world's most popular online music, app, TV and movie store with a catalog of over 26 million songs, over 700, 000 apps, over 190, 000 TV episodes and over 45, 000 films.

ENGADGET: Apple announces redesigned iTunes for Mac, Windows and iOS devices

Current hits in the iTunes App Store include Call of Duty: World at War Zombies, Plants Versus Zombies, Zombie Farm and Call of Mini: Zombies.

FORBES: Technology

Version 2.5 offers improved productivity features as company expands service into every Apple App Store and Google Play market in the world.

ENGADGET: CloudOn announces new features, worldwide availability on iOS and Android