Where can I get up-to-date statistics on the operating systems used?

Question

Operating Systems

Good people.
Before developing a cross-platform information system (including for mobile operating systems), I wanted to clarify the statistics on the operating systems used in order to prioritize the release of applications. But I did not find the same type of statistics. Either PC axis or mobile. Everywhere different information.
I admit that I can do something wrong. Therefore, "Monsieur, neman shpa sis jur." Maybe someone knows where the stronghold of such necessary statistics in recent times or realtime?

Answer 1

The whole world is guided by 2 statistics:
gs.statcounter.com/
www.netmarketshare.com/report.aspx?qprid=11&qpcustomb=0
Do not listen to any nonsense about w3schools

Answer 2

And will it really be very different for the OS? Well, for example, good examples: www.w3schools.com/browsers/browsers_os.asp
www.w3schools.com/browsers/browsers_mobile.asp
(and this is the first link).
More: en.wikipedia.org/wiki/Usage_share_of_operating_systems
in both examples, the last month is October.

Answer 3

LiveInternet, for example, gives statistics on all OSes and even devices.
Here are our website statistics:
Windows 7
Windows XP
Android
iOS iPad
MacOS
iOS iPhone
Windows 8
Windows Vista
Unix
SymbianOS
Others 23
Windows CE
Windows 2003 9 0.4% 3 0.1% 2.2 0.1% 3.4 0.2%
Windows 2000 0 0.0% 1 0.0% 0.25 0.0% 0.14 0.0%
Windows 0 0.0% 0 0.0% 0.25 0.0% 0.43 0.0% Undefined
0 0.0% 0 0.0% 0.25 0.0% 0.14 0.0%