Not exactly what you describe, but there's Yuka for processed products (food and cosmetics). You scan a barcode and it gives you a score based on the product composition, it's quite helpful: https://yuka.io/en/. - Source: Hacker News / 3 months ago

I would have thought the same until I found yuka (https://yuka.io/en/) and saw that they make multi-millions per year. - Source: Hacker News / 5 months ago

There’s a couple really great apps for scanning your products. The one I use more is Yuka. It’s free, and cites scientific sources and descriptions of ingredients as well as recommends alternatives in a non-biased was (brands can’t pay them to promote their products) and there’re very transparent about where their funding comes from. There’s also the EWG.org website (they also have an app but I don’t like it as... Source: 6 months ago

It's not good to use spray tan or any kind of makeup that has toxic ingredients. When I first started covering Vitligo with spray tan, I was using some of the worst products! I'm lucky I wasn't hurt. I found out about the Environemntal Work Group app and the Think Dirty app, but I was still getting products like body lotion, scented soaps etc that weren't good - even though they were reccomended by EWG and TD! ... Source: 7 months ago

In the short term it’s probably fine. If you want to use “healthier” hair products, I’ve been using the Yuka app to find better products.you basically scan the barcode and it gives you a rating from bad-excellent on a 0-100 scale. It’s nice because it actually tells you what ingredients are bad and why. When I checked my clear eco-styler most of the ingredients are good (risk-free), but 3 were bad enough to get a... Source: 11 months ago

Except it's not 2017 any more and there are actual apps that do that now. Source: about 3 years ago