Building a browser-based tuner/analyzer — would love feedback from other musicians before I go further

[Basov_Lev]

I've been experimenting with audio analysis in the browser and got to a point where I'd like some honest opinions before investing more time.
It's a tuner + spectrum analyzer + oscilloscope that runs in the browser — you can try it here if you want: https://mudscope.netlify.app
Runs entirely in browser. No install, no account, no backend. In the future, this will be rebuilt into an iOS app.
The tuner runs two detection algorithms in parallel (one for standard range, one optimized for low frequencies) and I'm not sure if that actually helps in practice or if it's overengineered. The spectrum maps FFT to chromatic bands so you see notes instead of raw frequencies — but I don't know if musicians find that more useful than a normal EQ view.

What I'm looking for:

Tuner accuracy — does the dual-algorithm approach actually help on your instrument? Especially curious about bass, cello, baritone guitar, anything below standard tuning.
What's the one feature that would make you bookmark this?
What other features would you like to see in this app?

Thanks for any feedback!