Fine Tuner - Fine Tuner is a minimalistic guitar tuner that utilizes your device's built-in microphone.
Pitch Grid Test - Measure your pitch-distance precision recognition. The resulting relative pitch indicator shows your sense for relative pitch.
Metronomus - Powerful and beautiful online metronome
TuneCrack - TuneCrack stands for: Crack the tuning problem. The importance of tuning is often underestimated.
LINGOT - Musical instrument tuner, LINGOT is a musical instrument tuner.
Guitar Tuna - GuitarTuna is the easiest, fastest and most accurate guitar tuner app out there!