Usage statistics for Phylo from 3 December 2012 until 3 April 2013. (a) Number of classic (in green) and expert puzzles (in red) completed over time. The number of classic puzzles submitted by registered players is shown in blue. (b) Number of visits to the Phylo website per country. (c) Number of registered players vs minimum number of puzzles completed. Statistics for the classic version are shown in green for the classic version and in red for the expert version. (d) Social posts that led to a visit to Phylo. Social networks are shown in blue, social news services in red and blogs in green.