Free tools
Free Skincare Tools
Practical, no-signup tools to help you make smarter skincare choices. Free to use and free to share.
Tool 01Ingredient intelligence
Comedogenic Ratings Evidence Guide
Understand why 0-to-5 ingredient charts disagree, which test details matter, and why a raw ingredient score cannot predict a finished product or individual response.
Read the evidence guide
Tool 02Label intelligence
Fragrance Label Checker
Paste a cosmetic ingredient declaration to check for fragrance, perfume, or parfum, with clear limits for fragrance-free and unscented wording.
Check a fragrance label
Tool 03Buying intelligence
Moisturizer Cost Per Use Calculator
Turn a price and a net size into cost per application, cost per month and year, and how long one jar lasts, using published finger-tip unit coverage figures.
Work out your cost per use
Tool 04Ingredient intelligence
Moisturizer Ingredient Decoder
Paste an ingredient list to sort each ingredient into occlusive, emollient, humectant, or a supporting role, see which of the three functions is missing, and read whether the formula is water-based or anhydrous.
Decode an ingredient list
Tool 05Environment intelligence
Indoor Humidity Calculator for Dry Skin
Your weather app reports outdoor humidity. Enter it with your thermostat setting to see the far lower relative humidity heated indoor air actually reaches, how far that sits below the range the EPA gives for homes, and what to change in a routine at that level.
Check your indoor humidity
Tool 06Routine intelligence
Skincare Layering Order Planner
Tick the products you use and get your morning or evening routine in order, with the reason for every position, the two waits that have a document behind them, and a plain label on every rule that is only convention.
Plan your layering orderTool 07Product care intelligence
Tallow Texture Troubleshooter
Grainy, rock hard, soupy, or speckled. Tick what your jar is doing and get the mechanism behind it from published beef tallow crystallisation measurements, whether it can be undone, and which single observation means stop rather than fix.
Diagnose a texture changeTool 08Ingredient intelligence
Fatty Acid Comparison for Skincare Oils and Butters
Published gas chromatography figures for beef tallow, shea, coconut, argan, avocado, safflower and rose hip, three at a time, with a relative oxidation index built from measured rates and three ingredients that turn out to have no fatty acid profile at all.
Compare fatty acid profiles
Tool 09Before you start intelligence
Patch Test Planner
Patch test first is advice with the useful half missing. Tick what you are about to start using and get the site, the dose, the twice-daily schedule, and the watch period from the published open application test protocol, plus the honest total for testing four new products one at a time.
Build a patch test schedule