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: 2,951,452 (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):

Spain Spain12.9%
United States United States12.0%
Germany Germany11.1%
China China6.5%
Italy Italy6.2%
France France5.7%
United Kingdom United Kingdom4.4%
Netherlands Netherlands3.6%
Canada Canada3.5%
Poland Poland2.7%
Brazil Brazil2.4%
Russian Federation Russian Federation2.3%
Australia Australia2.1%
India India1.6%
Argentina Argentina1.4%
Austria Austria1.2%
Hungary Hungary1.1%
Belgium Belgium1.0%
Mexico Mexico0.9%
Czech Republic Czech Republic0.9%
Ukraine Ukraine0.9%
Turkey Turkey0.9%
Japan Japan0.9%
Switzerland Switzerland0.8%
Bulgaria Bulgaria0.6%
Chile Chile0.5%
Taiwan, Province of China Taiwan, Province of China0.5%
Romania Romania0.5%
South Africa South Africa0.5%
New Zealand New Zealand0.5%

% of unknown IP addresses: 0.0%

Most popular versions (Top 20):

2.85.112.9%
3.4.011.7%
3.3.06.1%
3.0.05.2%
3.2.14.9%
3.1.14.7%
2.82.03.3%
2.83.03.0%
2.80.01.8%
2.76.01.4%
2.84.01.3%
2.78.01.3%
2.77.01.3%
1.48.01.3%
2.79.11.2%
2.48.01.2%
2.71.01.1%
2.74.01.0%
2.63.01.0%
2.70.01.0%

Operating systems calibre runs on

win83.1%
osx14.8%
oth2.1%