In a blog post, Lou Gazzola, senior manager in charge of BlackBerry's App Ecosystem and Developer Outreach team, said they are disappointed as they know so many users love these apps (Facebook and WhatsApp).

"We fought back to work with WhatsApp and Facebook to change their minds, but at this time, their decision stands (but let them know how you feel on social media, using the hashtag #IloveBB10Apps)," Gazzola posted.

"Our commitment to BlackBerry 10 and to developers has not changed - we know our developer community continues to be one of the strongest proponents of BlackBerry 10 and they are creating thousands of apps every month," he added.

Facebook's decision comes as BlackBerry begins to look beyond its own operating system.Last year, it introduced its own Android-based phone called the Priv.

Priced at Rs 62,990 with a sleek design and touch-sensitive keys that allows users to swipe, scroll and set up shortcuts, Priv comes pre-loaded with BlackBerry's DTEK for Android that allows user to improve privacy level and monitor access to the phone.

"As a way to support them and to promote new apps, we're now featuring some of the best native applications on BlackBerry World in a list called 'Great Apps on BlackBerry'. The category will be a list of 20 applications, featured for two weeks, once per month, similar to the way we feature apps on the BlackBerry World Carousel," Gazzola posted.

"We look forward to new apps and new customers on BlackBerry 10 and thank our developer community for their continued strong support," he added.