Trace: Soap Calculator is an iOS app for cold-process soapmakers, providing a chemistry-cited calculator for oils, lye, water, and additives. It includes SAP values, dual-lye blends, fragrance caps, and detailed source references, helping users create safe, reliable soap recipes.
Trace is an Other lifestyle & personal project. It enables soapmakers to accurately calculate and document cold-process soap recipes with chemistry-backed references. It is built as a consumer product for soapmakers and DIY chemistry enthusiasts. Pricing is paid. Trace is available on iOS.
Roman Kopaliani builds and maintains Trace, and it first shipped in 2026. Among its 8 catalogued features are soap recipe calculator, cited chemistry sources, and Oil SAP values.
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