As time passes, your piano's sound changes as the strings wear out. I inspect your piano for playability and tune it to A-440, which is the concert standard pitch.
Most piano manufacturers recommend getting your piano tuned twice a year. I provide piano tuning by ear for $100.
In some cases, I'll have to bring up the piano's pitch so that your strings and tuning pins will be properly positioned. As a result, your piano will have a finer tune. I'll gladly perform a piano pitch raise for $50.