What is your favorite practice tool?

Metronome:
77 votes 31%

Chromatic tuner or other tuning device:
39 votes 16%

Mirror:
32 votes 13%

Recording device (video or audio):
30 votes 12%

Practice mute:
20 votes 8%

Accompaniment tracks:
17 votes 7%

Practice journal:
11 votes 4%

Tablet for sheet music:
11 votes 4%

An app (I'll explain below):
8 votes 3%

Counting device (for repetitions):
1 votes 0%

(Poll closed: 246 votes)