Sort of. There are two big steps. The first step is to determine the optimal OSCCAL register value. The Tiny Tuner code helps with this step. By feeding 'x' characters the code is able to determine the optimal value. The value is either output to the terminal or stored in EEPROM depending on which Sketch you run.
The second step is to use the optimal OSCCAL register value. That is solely your responsibility. For some applications, it is appropriate to "hard code" the value. For other applications, reading the value from EEPROM works better. You have to decide which works best for your application.
Does that help?