Firefox and Chrome have supported Midi for a while now so it should be fairly easy to create using Sysex. By keeping it web based, it would be a universal tool for very OS. With many browsers you can create shortcuts which open in their own window, making the webpage feel much more like an app:
https://support.google.com/chrome_webst ... 0053?hl=en
Could come in handy for all the (future) new features!
- changing metronome sound & time signature
- managing offset separately for all Midi & analog clock outputs
- adjusting swing (is this a thing yet?

- managing tempo presets
- changing analog clock out resolution
- toggling auto start with DAW
- ...