Climbing Grade Converter. GradeClimb is a grade converter for 14 grading systems: Climbing UIAA, French, Yosemite, UK Tech., UK Adj., Saxon, Brazil, Finnish, SWE/NOR, Ewbank Ewbank Bouldering Fontainebleau, V-Scale, Brazil GradeClimb is a must-have app for every climber, from beginner to professional.