Usage statistics

Usage statistics are collected whenever a user starts calibre. Every calibre installation has a unique 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.

Active installs: 3,445,818 (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 (240 countries, top 30 shown):

United States United States13.7%
Spain Spain13.5%
Germany Germany11.8%
Italy Italy6.6%
United Kingdom United Kingdom5.1%
France France4.8%
Canada Canada4.0%
China China3.4%
Netherlands Netherlands3.3%
Poland Poland2.8%
Russian Federation Russian Federation2.6%
Australia Australia2.4%
Brazil Brazil2.4%
Austria Austria1.3%
Argentina Argentina1.2%
India India1.2%
Ukraine Ukraine1.2%
Hungary Hungary1.1%
Czech Republic Czech Republic1.1%
Mexico Mexico1.0%
Belgium Belgium0.9%
Switzerland Switzerland0.7%
Romania Romania0.6%
Bulgaria Bulgaria0.6%
Turkey Turkey0.6%
South Africa South Africa0.6%
Japan Japan0.6%
Chile Chile0.5%
New Zealand New Zealand0.5%
Ireland Ireland0.5%

% of unknown IP addresses: 0.0%%

Most popular versions (Top 20):

2.20.013.6%
2.19.08.7%
2.22.08.1%
2.21.05.9%
2.18.04.4%
2.12.03.7%
2.16.03.4%
1.48.02.9%
2.17.02.7%
2.15.02.0%
2.14.01.8%
2.13.01.5%
2.5.01.3%
2.3.01.2%
1.35.01.1%
2.10.00.9%
2.9.00.9%
2.11.00.9%
2.0.00.8%
1.39.00.8%

Operating systems calibre runs on

win84.4%
osx14.0%
oth1.6%