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: 1,627,045 (those that have started calibre at least once in the last 59 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 (237 countries, top 30 shown):

Spain Spain13.1%
United States United States12.3%
Germany Germany11.5%
Italy Italy6.1%
China China5.9%
France France5.8%
United Kingdom United Kingdom4.3%
Canada Canada3.7%
Netherlands Netherlands3.4%
Poland Poland2.9%
Brazil Brazil2.5%
Russian Federation Russian Federation2.3%
Australia Australia2.1%
Argentina Argentina1.4%
India India1.4%
Austria Austria1.2%
Hungary Hungary1.1%
Czech Republic Czech Republic1.0%
Belgium Belgium1.0%
Mexico Mexico0.9%
Ukraine Ukraine0.9%
Japan Japan0.8%
Switzerland Switzerland0.8%
Turkey Turkey0.7%
Bulgaria Bulgaria0.6%
South Africa South Africa0.5%
Romania Romania0.5%
Chile Chile0.5%
Taiwan, Province of China Taiwan, Province of China0.5%
New Zealand New Zealand0.5%

% of unknown IP addresses: 0.0%

Most popular versions (Top 20):

2.82.022.2%
2.83.015.6%
2.80.03.9%
2.81.02.7%
2.79.12.5%
2.78.02.4%
2.76.02.2%
2.77.02.2%
2.71.01.6%
2.74.01.6%
2.73.01.5%
2.70.01.4%
1.48.01.3%
2.63.01.3%
2.48.01.2%
2.69.01.1%
2.68.01.0%
2.75.10.9%
2.53.00.9%
2.56.00.9%

Operating systems calibre runs on

win83.6%
osx14.3%
oth2.1%