Musical instrument strobe tuner
The MacOS dmg file contains a universal binary created by GitHub actions. It should run on both X86_64 and M1 systems without translation.
As the range of the tuner is from C0 to D8, the top two and bottom two octaves loop around the treble and bass staff respectively. So C0 and C2 are shown on the staff as C4, and C6 is shown as C4.
Latest version from Google code