It's also interesting, will the application import LUT from Affinity Photo iPad?
That would be great, I've been downloading this app too.
It turns out a great feature, if such an indication is not displayed on the tablet itself, where there is not enough free space, but to provide the option to turn on the display on the iPhone (because the application is there too).
S-Curve (right indicator) also very important.
You're much more advanced than me, I totally agree with you if there's a histogram (which is quite useful), it would be great important to have it on a separate site, maybe by one-touch opening/closing.