This week in mobile app business news:

• Gordon Ramsay partnering with Glu, the company behind Kim Kardashian's hit app. Glu has a history of partnering with celebrities to build successful apps and it seems Ramsay is next in line.

http://venturebeat.com/2016/01/19/gordon-ramsay-joins-kim-kardashian-in-glu-mobiles-gaming-stable/

• App Annie have released their 2015 Retrospective. The report looks at key data from across the mobile app industry in 2015. Lots of great insights in this one.

http://blog.appannie.com/app-annie-2015-retrospective/

• An ecommerce platform has just released a new mobile app that is designed to support black owned businesses by ramping up the ability to purchase from them. The app is called Purchase Black.

http://mobilemarketingwatch.com/first-ever-all-black-marketplace-mobile-app-debuts-from-purchaseblack-com-64774/

• Venturebeat's take on the App Annie 2015 Retrospective. The key takeaway from this one is the fact that Google had 2x more downloads than Apple, but Apple had 75% higher mobile app revenue.

http://venturebeat.com/2016/01/20/app-annie-2015-google-play-saw-100-more-downloads-than-the-ios-app-store-but-apple-generated-75-more-revenue/

• More acquisitions in the mobile space with Spotify acquiring two social messaging apps. They purchased NY based company 'Cord Project', and Dublin based 'Soundwave'.

http://www.thedrum.com/news/2016/01/20/spotify-snaps-startups-cord-project-and-soundwave-bolster-its-social-media-messaging

• Pinterest to ad video ads, following the lead from Facebook & Instagram

http://digiday.com/platforms/pinterest-puts-new-video-ads-plan-motion-sources-say/

• Pollen VC will now offer a user acquisition service. Pollen help mobile startups with cashflow by providing payment for app revenue almost instantly, instead of waiting 1 month+ to receive revenue from Apple/Google. Funds can now be used to acquire new users.

http://venturebeat.com/2016/01/18/pollen-vc-launches-user-acquisition-service-for-mobile-game-and-app-makers/

• Eric Seufert shares what he sees as the 'User Acquisition Mega-Trends for 2016'

http://www.slideshare.net/EricSeufert/3-mobile-user-acquisition-megatrends-for-2016