Understanding freemium models with the free cookie clicker — a UX analysis, by Takuma Kakehi

Case study: Conversion from freemium to premium, by Andrewcox

Understanding the Kano Model — A Tool for Sophisticated Designers, by Jared M. Spool

Case study: Conversion from freemium to premium, by Andrewcox

Ruler of the Ephemeral Flow, Cookie Run Wiki

Freemium-Premium Pricing Strategies – Dılek's Blog

Case study: Conversion from freemium to premium, by Andrewcox

Cookie Clicker Analysis. The conglomerate that will destroy your…, by Kaleb Nekumanesh

Case study: Conversion from freemium to premium, by Andrewcox

Case study: Conversion from freemium to premium, by Andrewcox

Cookie Clicker 0.2.933 Free Download

Takuma Kakehi – Medium