Off the top of my head: related to pilates, menstrual cycle tracking, childcare, crochet, knitting, home schooling, interior design, manicure, fashion, cooking.

Off the top of my head: related to pilates, menstrual cycle tracking, childcare, crochet, knitting, home schooling, interior design, manicure, fashion, cooking. I would guess that any of these areas are less well-served by software than an equivalent sized market aimed at men. It used to be that women had a lot less disposable income than men. But I don't think that is true in most western countries now. BTW I'm not trying to be sexist or patronizing. I know that plenty of women are also into ju-jitsu, riding motorbikes, mountaineering etc. But some hobbies and careers clearly have a higher percentage of females. I expect that markets for the elderly are also under served. Technical support might be a challenge though!