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):

Operating systems calibre runs on