Can this be improved?

I submit that it cannot. Ive been playing for almost 20 years, used a multitude of tuners, both physical and app-based, and Polytune is the best tuner Ive ever used hands down and without reservation. It is well accurate and the fact that it tunes all six strings at once is musical icing on the cake. I dont write reviews. Ever. But I got this app years ago when it first came out(for free I might add) and I have been using it with pleasure ever since.

6stringslingr about PolyTune, v1.1.0