The name iCalamus derives from the software Calamus by the same manufacturer but neither offers document compatibility nor shares a single line of source code with the latter.

(Calamus derives from the Latin name of a writing instrument made of reeds; see Kalamos.)

[6][7] In March 2018, invers Software announced the cessation of its business operations and hence the distribution and development of iCalamus.

Version 2 was released at the end of 2013, requires (since v2.14) OS X 10.11 (El Capitan) and is a 64 bit application.

[8] The software offers twelve languages: Czech, Danish, Dutch, English, French, German, Italian, Japanese, Latvian, Polish, Spanish, Swedish.