If you want to measure slope angles in all conditions and scenarios, I’d recommend a 2nd device to supplement your PoleClinometer slope meter.  My favorite is the Avalanche Inclinometer app:  Best avvy inclinometer app hands-down, and works in all use-modes (sighting cross-slope, sighting up/down-slope, & contact measurement) unlike most other apps & devices which usually only support one or two of these use modes.