Yes, I know, black or white, optical or may be even philosophical question. Which is NO color? In RGB and in fact in nature no color means black, that's true, in CMYK = print, no color is white. You and nature are obviously right. I assume many Photoshop users will use this app, so it may be very convenient to add preferences, where user could choose system for Grays, something like:
Perception of Grays • RGB • CMYK.
(In many years with Photoshop I didn't noticed til now, that in Grayscale mode when defining color in Color Picker there's no Gray definition (just HSB, RGB, Lab, CMYK and web). As if grey is not true color in a system, RGB or CMYK. And it's true, in fact it is only equal amount of all colors. But in real life usage - it is percentage of black on white in CMYK without CMY, that's PRINT with 1 color, usually black. This is only real usage of GRAYS I can think of. So Photoshop stays on this side in its Info palette when reading percentage of black. Not to mention why Black is in CMY(K) anyway - this is "bad" nature of print, on printing machines or home printers.)
I can't help myself, I constantly drag colors faster than app let me to.
My experience with ajaster 2): I must say that when I imported palette from picture, Palettes never crashed on my iTouch, I did it 20 or 30 times; it may be not enough to experience crash.