The cent is the standard fine-grained unit for describing pitch differences. Dividing each equal-tempered semitone into 100 parts gives 1200 cents per octave, a scale small enough to capture tuning errors the ear can barely notice. Trained listeners typically detect differences of around five to ten cents, so a chromatic tuner that reads in cents lets you correct intonation well below the resolution of note names. In practice, a reading of +10 cents means the string is slightly sharp and should be loosened, while -10 cents means it is flat and should be tightened. Cents also make it possible to compare different tuning systems on a common scale: just intonation intervals, for example, differ from equal temperament by small but musically meaningful amounts measured in cents. On FretMind, the tuner displays cents so you can bring each string to within a couple of cents of its target frequency rather than settling for merely close.