Coverage & match quality
1 rating · 1 of 4 axes
no black box
We don't rate products ourselves. We collect what each public rater already says, put every scale on common ground, and keep the disagreements visible instead of averaging them away.
Collect each rater's own score
Every source keeps its native verdict for this product. We never invent a score for an axis a source didn't measure.
Normalize to 0–100, higher = better
Raters can use different scales and directions: some where a low number means safe, some where a high one does. We map them all onto one 0–100 axis and flip the ones that run backwards so the numbers are finally comparable.
Average per axis, but keep the spread
Scores on the same axis become one representative number (their mean). When raters split by 20+ points we flag it and keep every rater's number. A disagreement is never blended into silence.
Your weights make the overall
The ring is the weighted average of the four pillars using your weights. It's computed fresh every time and never stored, so there's no hidden “objective” default.
worked example · Ingredient safety
Greenlens Ingredient Scan
Independent · EU regulatory reference
No EU-regulated hazards recognized among 13 ingredients.
Starts at 100; 13 other ingredients carried no recognized regulated hazard. Absence of a flag means no regulated hazard was recognized — not proof of safety. This is one lens; see where raters disagree above.
Why this score
Every ingredient, under all three lenses
The Scan is one opinion. See how the strict and lenient lenses read the same list, ingredient by ingredient.
Tune your weights
composite recomputes live
+No rater covers this axis for this product, so its weight can't move the score.
No rater covers this axis for this product, so its weight can't move the score.
No rater covers this axis for this product, so its weight can't move the score.
Data availability
Robust13 of 13 characterized
Our sources have reference data on all 13 listed ingredients.
| Ingredient | What it does | Safety | Data |
|---|---|---|---|
| Ethyl Acetateperfumingsolvent | perfumingsolvent | EU harmonised skin sensitizer· flagged by 1 of 9raters disagree | CosIng-catalogued |
| Butyl Acetatefragrancesolvent | fragrancesolvent | No flags in our sources | CosIng-catalogued |
| Nitrocellulosefilm forming | film forming | No flags in our sources | CosIng-catalogued |
| Adipic Acid/Neopentyl Glycol/Trimellitic Anhydride Copolymerfilm forming | film forming | No flags in our sources | CosIng-catalogued |
| Acetyl Tributyl Citrateperfumingfragranceplasticiser | perfumingfragranceplasticiser | ANSES endocrine candidate· flagged by 1 of 9raters disagree | Referenced |
| Isopropyl Alcoholperfumingantifoamingsolvent | perfumingantifoamingsolvent | No flags in our sources | Well-characterized |
| Heptanesolvent | solvent | No flags in our sources | CosIng-catalogued |
| Norbornanediamine/Resorcinol Diglycidyl Ether Crosspolymerfilm forming | film forming | No flags in our sources | CosIng-catalogued |
| Isophorone Diamine/Isophthalic Acid/Tromethamine Copolymerbinding | binding | No flags in our sources | CosIng-catalogued |
| Aluminum Hydroxidehumectantemollientopacifying | humectantemollientopacifying | No flags in our sources | CosIng-catalogued |
| Stearalkonium Hectoritegel formingviscosity controlling | gel formingviscosity controlling | No flags in our sources | CosIng-catalogued |
| Sucrose Acetate Isobutyratefilm formingplasticiser | film formingplasticiser | No flags in our sources | CosIng-catalogued |
| Pentaerythrityl Tetraisostearateemollientsurfactant - cleansingsurfactant - emulsifying | emollientsurfactant - cleansingsurfactant - emulsifying | No flags in our sources | CosIng-catalogued |