Undertone Test

Undertone Test answers one question quickly and then gets out of the way: is your skin warm, cool or neutral, and which colours flatter it. That matters for anything from choosing foundation and hair colour to building a wardrobe palette, and the usual options are either a salon appointment or an app that wants your face and your email first. This is a short guided test that runs in about thirty seconds with no account and no photo upload, so nothing about your appearance leaves your device — a genuinely meaningful difference when the alternative is handing a selfie to a service with unclear retention. The output is your undertone plus a personalised set of colours that work with it, which is enough to act on immediately in a shop or online. Its limits are the limits of self-assessment: answers depend on honest observation under decent lighting, results can shift with tanning or lighting conditions, and a professional colour analysis will always be more precise than a questionnaire. Free, with no signup, so the cost of checking is nothing.