And if you'd like to try the app itself: https://huggingface.co/spaces/filipacsr/TrueAge

Hope you enjoy it! And for the code: https://github.com/FilipaCSR/TrueAge

In this specific case, the model I’m using (KDM biological age) relies on sex-specific medical reference parameters from the original research datasets. The field isn’t used to define identity — it’s only to apply the correct physiological coefficients.

That said, I recognize that models like this were built on limited population data, and they may not perfectly represent everyone’s biology. I’m actively thinking about how to communicate those limitations transparently and improve inclusivity over time.

Thank you again for calling this out, it genuinely matters.