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: 3,047,446 (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 (238 countries, top 30 shown):
![]() |
Spain | 12.9% |
![]() |
United States | 12.2% |
![]() |
Germany | 10.1% |
![]() |
China | 7.0% |
![]() |
Italy | 6.3% |
![]() |
France | 6.0% |
![]() |
United Kingdom | 4.2% |
![]() |
Canada | 3.6% |
![]() |
Netherlands | 3.0% |
![]() |
Poland | 2.8% |
![]() |
Russian Federation | 2.4% |
![]() |
Brazil | 2.3% |
![]() |
Australia | 2.0% |
![]() |
India | 1.5% |
![]() |
Argentina | 1.4% |
![]() |
Hungary | 1.2% |
![]() |
Austria | 1.1% |
![]() |
Mexico | 1.1% |
![]() |
Czech Republic | 1.0% |
![]() |
Ukraine | 1.0% |
![]() |
Belgium | 0.9% |
![]() |
Turkey | 0.9% |
![]() |
Japan | 0.8% |
![]() |
Switzerland | 0.8% |
![]() |
Bulgaria | 0.7% |
![]() |
Romania | 0.6% |
![]() |
Taiwan, Province of China | 0.6% |
![]() |
Chile | 0.5% |
![]() |
South Africa | 0.5% |
![]() |
New Zealand | 0.5% |
% of unknown IP addresses: 0.0%
Most popular versions (Top 20):
3.15.0 | 12.7% |
3.18.0 | 12.2% |
3.17.0 | 9.7% |
3.16.0 | 9.2% |
3.14.0 | 4.8% |
3.12.0 | 2.9% |
3.7.0 | 2.3% |
3.13.0 | 2.2% |
2.85.1 | 1.7% |
3.6.0 | 1.6% |
3.10.0 | 1.5% |
3.9.0 | 1.5% |
2.48.0 | 1.4% |
3.8.0 | 1.3% |
2.82.0 | 1.2% |
1.48.0 | 1.1% |
3.4.0 | 1.1% |
3.11.1 | 1.0% |
2.83.0 | 1.0% |
2.80.0 | 0.8% |
Operating systems calibre runs on
win | 82.6% |
osx | 15.2% |
oth | 2.2% |