It is a known fact that Apple dominates the usage of smartphones and tablets in enterprise markets, to list out the usage statistics Citrix gave a through analytics document giving various statistics of its enterprise tools usage from mobile devices. Citrix provides secure access to various windows environments using mobile devices and states that almost 58% of the requests arise from iOS devices which is not as high as what other reports suggest but it is still surprising to see such high number considering the usage is done by users inclined towards windows. The nearest competitor to iOS devices for using Citrix tools is Android with an adaption rate of 35% and declining.
One of the major concerns with adaption of Android in enterprise markets seems to be malware affecting Android devices. McAfee reports that mobile malware reports have increased to 40000 in the recent times compared to 50000 on desktops and laptops. Almost 98% of the malware reports on mobile devices have been reported on Android platform itself which shows how insecure it is to use them for enterprise mobility.
Though iOS usage dominates across the various continents for Citrix tools, Europe seems to be giving a tough competition to iOS with Windows and Android combined beating iOS unlike other markets. Specific industries like Communication services, Healthcare, Non-profit, Transportation and Utilities seem to be more inclined towards Android devices and Oil & Gas sector preferring Windows.
A complete report of from Citrix can be found here.