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: 2,833,883 (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 | 12.7% |
 |
United States | 11.9% |
 |
Germany | 9.3% |
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China | 7.3% |
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France | 6.4% |
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Italy | 6.0% |
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United Kingdom | 4.0% |
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Canada | 3.4% |
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Netherlands | 3.2% |
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Poland | 2.6% |
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Brazil | 2.4% |
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Russian Federation | 2.2% |
 |
Australia | 1.9% |
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India | 1.6% |
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Argentina | 1.6% |
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Mexico | 1.1% |
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Japan | 1.1% |
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Hungary | 1.1% |
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Austria | 1.0% |
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Czech Republic | 1.0% |
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Belgium | 1.0% |
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Ukraine | 0.9% |
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Turkey | 0.8% |
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Switzerland | 0.8% |
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Taiwan, Province of China | 0.7% |
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Bulgaria | 0.7% |
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Unknown | 0.6% |
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Romania | 0.6% |
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Chile | 0.6% |
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Viet Nam | 0.5% |
% of unknown IP addresses: 0.6%
Most popular versions (Top 20):
| 3.46.0 | 25.8% |
| 3.47.1 | 8.0% |
| 3.44.0 | 6.4% |
| 3.48.0 | 4.6% |
| 3.40.1 | 3.6% |
| 3.42.0 | 3.3% |
| 3.47.0 | 3.1% |
| 3.39.1 | 2.6% |
| 3.45.2 | 2.4% |
| 3.34.0 | 2.1% |
| 3.36.0 | 1.2% |
| 3.37.0 | 1.2% |
| 3.38.1 | 1.1% |
| 3.31.0 | 1.1% |
| 3.28.0 | 1.1% |
| 3.41.3 | 1.1% |
| 3.33.1 | 0.9% |
| 3.32.0 | 0.9% |
| 3.35.0 | 0.9% |
| 3.26.1 | 0.7% |
Operating systems calibre runs on
| win | 81.8% |
| osx | 15.7% |
| oth | 2.5% |
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