DarthGrader

was born in June 22 in Grenoble, French Alps.


You are disappointed with the calculation’s result? There are several possibilities:
You are stronger or weaker than you think;
You underestimated or overestimated a boulder section, that's classic;
You found a specific case, a bug... Good job!
Please send it to us.


Send us an email in [EN] or [FR] at:

contact@darth-grader.net