He's marketing it to men, to track their gf/wife's PMS.
Don't you think that it would make WAY more money if it were marketed to women as a way to track fertility? It could be a natural family planning tool to use either for preventing pregnancy or TTC. Temping made simple.
Re: This guy has the wrong sales pitch.
I think my behavior and tone is enough of a "visual aid" to help my husband determine it's my time of the month.
I do see it being a success if there was a bracelet that could do temping for ovulation, etc. though. You should market that idea!