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: 366,877 (those that have started calibre at least once in the last 3 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 (228 countries, top 30 shown):

United States United States14.4%
Spain Spain12.3%
Germany Germany8.7%
China China7.1%
Italy Italy6.0%
France France5.8%
United Kingdom United Kingdom4.2%
Canada Canada4.0%
Netherlands Netherlands2.9%
Poland Poland2.7%
Brazil Brazil2.5%
Russian Federation Russian Federation2.2%
Australia Australia2.1%
Argentina Argentina1.5%
India India1.3%
Japan Japan1.3%
Mexico Mexico1.1%
Austria Austria1.0%
Czech Republic Czech Republic0.9%
Hungary Hungary0.9%
Belgium Belgium0.9%
Taiwan, Province of China Taiwan, Province of China0.9%
Ukraine Ukraine0.8%
Switzerland Switzerland0.8%
Turkey Turkey0.7%
Bulgaria Bulgaria0.6%
Chile Chile0.5%
South Africa South Africa0.5%
Sweden Sweden0.5%
Romania Romania0.5%

% of unknown IP addresses: 0.0%

Most popular versions (Top 20):

Operating systems calibre runs on