Add metronome feature that beeps on BPM

Hi guys, the app is very helpful but I feel it's missing a very important and helpful feature that it the possibility of adding a Metronome.

TL;DR
Add Metronome functionalities to make beeps on the detected BPM or manual set BPM.

Description of Feature:
Likewise, a metronome option that can enable us to add also initial beeps count at the beginning, for instance:
1... 2... 1-2-3-4 <song starts>

Also, another metronome option that can for instance customize a higher pitch of the initial pit. For example:
- 1 / 4 (first higher pitch beep out of 4):
BEEP beep beep beep / BEEP beep beep beep / ...
- 1 / 8 (first higher pitch beep out of 8):
BEEP beep beep beep beep beep beep beep / ...

To above idea, we can add a secondary higher beep, like:
- 1 [5] / 8
BEEP beep beep beep 'Beep' beep beep beep / ...
- 1-2 [5-7] / 8
BEEP BEEP beep beep 'Beep' beep 'Beep' beep / ...

The metronome could be compound of:
- Main Beeps [ Secondary Beeps ] / Total beeps

What do you think?