25 free tools · no signup · cited sources
Free skincare tools that show their work.
Calculators and checkers that take your actives, your SPF, your routine — and give you one measured answer with the science cited. No signup, no 2,000-word blog post.
Tools in catalog 25
Cited sources Always
Signup required None
The Index
01—03 of 2501
TOOL-008 · CALCULATOR · UV-INDEX
SPF Duration Calculator
SPF 30–50+UV index~15s
SPF, skin tone, and today's live UV index → the real minutes before you need to reapply. Based on burn time, not the bottle's marketing.
Run
02
TOOL-009 · CHECKER · UVA-UVB
SPF & PA+++ Decoder
UVA/UVBPA system~20s Coming soon
Decode SPF, PA+++, PPD and broad-spectrum labels into plain protection levels — so you know what UVA and UVB coverage you are actually getting.
Soon
03
TOOL-003 · CALCULATOR · DOSAGE
Sunscreen Amount Calculator
Two-finger ruleBy body area~20s Coming soon
Most people use a quarter of the sunscreen they need. Get the exact amount in fingers, grams or ml for your face and body so your SPF actually performs.
Soon