According to the description, it says : “To celebrate his Birthday, Talking Carl is now Free, spread the news!”
There are Talking Carl and Talking Carl Free in App store but both of the same version which Talking Carl will cost you AUD $1.19. This is a funny little app that can brighten your day when you feeling flat. You can tickle him to make him laugh and he can repeat what you say. Try start your day by poking this little guy in the tummy.