Yes, that's true - TIMIFY is completely free of charge for you in the Classic version and will also stay free!
With Classic you can use the basic functions of TIMIFY, such as the online appointment calendar, your personal profile page and an unlimited number of bookings and offered services. You can also link the online appointment booking on your website and in your Facebook profile. TIMIFY Classic is the ideal solution for online appointment booking for one-man businesses or start-ups.
You can find an overview of all free features here: TIMIFY Classic