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Yes, people are trying. The problem is hard. https://www.rivetandcuff.com/find-your-fit
It's a shame that their cheapest pair of jeans is over $100. While I'm definitely a fan of getting something quality that lasts a while (rather than just buying new pairs of shitty $20 jeans every year) it would be great if there was something in the $50-80 range. Doesn't have to be the fanciest raw selvedge denim or whatever but just some solid, well constructed jeans made from good fabric would be my ideal.
We chose Men's jeans and the higher price point as a way to constrain the problem, and test our algorithms and technology. It turns out they work very well, but usability is not close to what it needs to be. We also have plans to use this for simple basics too. For example, am I a Medium or Large for that T-Shirt? Or, I liked that shirt at the Gap, but the one I just bought from J Crew fits totally differently. We also can use the phone to get measurements from, say, a foot so that we can then get the right shoes. These are all easily solvable with data and we can use image technology to capture a lot of it. But, we need more data. If anyone on the thread would help and go through the Find Your Fit process (again, we know it is not the best experience), we can add a coupon HACKERNEWS and take 40% off to get the price into the zone your talking about.