
Encyclopaedia Universalis
7.2#3 in online encyclopediasFrom €1 a monthAndroidiOSWeb
Visit
No prices published.
It suits individual readers seeking an ad-free reference collection, as well as schools, libraries, local authorities, and companies. The separate Junior and Éducation editions are aimed at primary, secondary, and higher education users.
You want what its maker publishes above — check its page for the details.