Nothing about a soul urge calculator is hidden or proprietary — it applies the same Pythagorean letter-to-number chart, and the same vowel-only rule, that a person could apply by hand. The value of automating it is speed and fewer arithmetic slips, not a different or more "accurate" method.
Because names vary so much in length and letter combinations, a calculator is particularly useful for handling the edge cases — double vowels, ambiguous Y's, multi-word surnames — consistently, rather than leaving each one to individual judgment.
