streamlining input of grades

since boulders in my gym are only color-graded and dont have an actual font-scale attached to them, inputing grades when logging a climb can feel very hit or miss.

most gyms have a chart somewhere lying around that equates their color-code to a range on the font (or v-) scale. i have attached such a table for my local gym.

anyway, when adding a gym to the app, let me select what color of holds they use AND also what grade they roughly refer to. that way, when logging a climb i only need to select the color of the hold and maybe have a + or - to select if the climb was on the harder or softer side; and the system can translate that in the background to an actual grade without me having to remember anything. i know this would only be a guesstimate on the side of the app, but it would be roughly right and enough for training-purposes

thanks for considering