Nitavera

Nitavera is a free web tool for anyone using more than a couple of skincare products. Add what's on your shelf and it flags common ingredient clashes, like retinol and glycolic acid on the same night, then tells you what to split up, alternate, or move to morning vs night. It also builds you a simple AM/PM order. There's an ingredient checker and an optional photo check for visible redness, oil and texture that runs on your device, so photos never get uploaded. No account needed. Cosmetic guidance only, not medical advice. No brand money or affiliate links.