Usage statistics

Usage statistics are collected whenever a user starts calibre. Every calibre installation has a randomly generated ID, this ID remains unchanged by upgrades and even an uninstall/re-install. This ID is used to collect usage statistics. Only this ID is stored, no other identifying information is collected. And no collected information is ever shared with any third party.

Active installs: 2,973,130 (those that have started calibre at least once in the last 60 days)

Note that installs are not users. A single user could run calibre on multiple computers. A single calibre install could be used by multiple people.

Installs by country (236 countries, top 30 shown):

United States United States12.6%
Spain Spain12.5%
Germany Germany7.8%
China China6.7%
France France6.1%
Italy Italy6.0%
Canada Canada3.9%
United Kingdom United Kingdom3.7%
Netherlands Netherlands2.8%
Poland Poland2.5%
Brazil Brazil2.4%
Russian Federation Russian Federation2.3%
Australia Australia2.0%
Argentina Argentina1.7%
Japan Japan1.5%
India India1.5%
Mexico Mexico1.4%
Hungary Hungary1.1%
Belgium Belgium1.1%
Austria Austria0.9%
Switzerland Switzerland0.9%
Czech Republic Czech Republic0.9%
Hong Kong Hong Kong0.8%
Taiwan, Province of China Taiwan, Province of China0.8%
Turkey Turkey0.8%
Chile Chile0.7%
Viet Nam Viet Nam0.7%
Ukraine Ukraine0.7%
Romania Romania0.6%
Singapore Singapore0.6%

% of unknown IP addresses: 0.0%

Usage share by major version

656.9%
525.6%
46.5%
37.4%
22.4%
10.7%
00.6%

Most popular versions (Top 20):

6.11.017.3%
6.10.013.1%
6.9.09.8%
6.8.03.7%
6.7.13.0%
5.44.02.8%
3.48.02.5%
6.3.02.0%
5.34.01.9%
6.5.01.6%
6.6.11.6%
6.4.01.4%
4.23.01.4%
5.43.01.3%
6.2.11.3%
5.42.01.2%
5.40.01.2%
6.1.01.1%
5.32.00.8%
5.35.00.8%

Operating systems calibre runs on

win81.9%
osx14.4%
oth3.8%