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: 2,961,762 (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 States11.8%
Germany Germany10.5%
China China6.9%
Italy Italy6.4%
France France6.0%
United Kingdom United Kingdom4.2%
Canada Canada3.5%
Netherlands Netherlands3.2%
Poland Poland2.8%
Russian Federation Russian Federation2.4%
Brazil Brazil2.3%
Australia Australia2.0%
India India1.5%
Argentina Argentina1.4%
Turkey Turkey1.2%
Austria Austria1.1%
Hungary Hungary1.1%
Czech Republic Czech Republic1.0%
Mexico Mexico1.0%
Belgium Belgium0.9%
Ukraine Ukraine0.9%
Japan Japan0.9%
Switzerland Switzerland0.8%
Bulgaria Bulgaria0.6%
Romania Romania0.6%
Taiwan, Province of China Taiwan, Province of China0.6%
South Africa South Africa0.5%
Chile Chile0.5%
Singapore Singapore0.5%

% of unknown IP addresses: 0.0%

Most popular versions (Top 20):

3.12.014.5%
3.13.010.6%
3.10.08.4%
3.9.05.8%
3.11.15.1%
3.7.04.1%
3.8.02.7%
3.6.02.5%
2.85.12.3%
3.4.01.6%
2.82.01.6%
2.83.01.4%
2.48.01.4%
2.80.01.3%
1.48.01.2%
3.3.00.9%
3.5.00.9%
2.76.00.8%
2.78.00.8%
3.0.00.8%

Operating systems calibre runs on

win82.9%
osx14.9%
oth2.2%