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: 3,207,760 (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 (241 countries, top 30 shown):

United States United States14.3%
Spain Spain13.5%
Germany Germany12.3%
Italy Italy6.7%
United Kingdom United Kingdom5.2%
France France4.8%
Canada Canada4.3%
Netherlands Netherlands3.5%
China China2.8%
Poland Poland2.7%
Australia Australia2.5%
Russian Federation Russian Federation2.5%
Brazil Brazil2.0%
Austria Austria1.3%
India India1.2%
Ukraine Ukraine1.1%
Hungary Hungary1.1%
Czech Republic Czech Republic1.1%
Argentina Argentina1.1%
Belgium Belgium0.9%
Mexico Mexico0.8%
Switzerland Switzerland0.7%
South Africa South Africa0.6%
Romania Romania0.6%
Bulgaria Bulgaria0.6%
New Zealand New Zealand0.5%
Japan Japan0.5%
Turkey Turkey0.5%
Ireland Ireland0.5%
Chile Chile0.4%

% of unknown IP addresses: 0.0%%

Most popular versions (Top 20):

2.12.013.0%
2.16.08.3%
2.13.05.8%
2.15.04.7%
2.14.04.3%
2.17.04.1%
1.48.03.1%
2.11.02.5%
2.5.02.1%
2.10.01.8%
2.9.01.8%
2.3.01.7%
1.35.01.6%
2.8.01.4%
2.7.01.3%
2.6.01.2%
2.0.01.2%
1.39.01.1%
2.4.01.0%
2.2.00.9%

Operating systems calibre runs on

win82.7%
osx15.5%
oth1.8%