But Apple fights back as the iPhone 4 receives the highest device share.
Mobile advertising network InMobi's latest report shows that Android is still leading the European mobile ad market, securing 34 per cent of impressions, which is a one per cent dip from November 2011.
Meanwhile, iOS secured 28 per cent, rising by five per cent, leaving RIM static in third place with 17 per cent.
Although Android leads by OS share, the popularity of Apple products is clear as the iPhone 4 took the highest number of impressions with nine per cent, also securing third spot with the original iPad.
Additionally, InMobi boosted its European footprint by 63 per cent in the 90 day period, equivalent to 15.2 billion monthly impressions.
Rob Jonas, VP and MD, EME, InMobi, says: "We expect to see continued growth in iOS, driven by last week’s unveiling of the new iPad, as well as the reduced pricing of the iPad 2.