For macOS · iPadOS · iOS
Your soap recipes,
beautifully calculated
Soap Studio is a recipe formulation app for cold-process and hot-process soapmakers. Accurate lye calculations, mould optimisation, batch logging, IFRA safety checks — and a calm, uncluttered workspace that feels like a creative lab, not a spreadsheet.
One purchase, all three apps · Works offline · No subscription, no account
Trustworthy maths
Every lye calculation is verified decimal-place accurate against SoapCalc and SoapmakingFriend. The numbers you weigh out are safe numbers.
Mould optimiser
Tell Soap Studio your mould dimensions and target bar weight. It finds the best cut plan — loaves, bars per loaf, cutting diagram — and never proposes a bar lighter than your target.
Batch journal
Log every batch with dates, temperatures, notes, and photos. Recipes are snapshot-stored, so your history survives even if you later change or delete a recipe.
No barriers
Nothing blocks calculation. No mandatory fields, no forced workflows, no accounts. Start a recipe, get your lye weights — done. Advanced features earn their place behind toggles.
Built by a soaper, for soapers
Soap Studio started as a port of a trusted Excel lye calculator that had been refined over years of real soapmaking. The goal was simple: take something mathematically solid and make it feel like a creative workshop instead of a spreadsheet.
One purchase covers the Mac, iPad and iPhone apps. Formulate on the Mac, take the iPad into the workshop or kitchen for manufacturing, browse and edit on your phone — freedom to do what you need, where you need to. No adverts, no subscriptions, no accounts, no cloud dependency.
Explore the full feature set →- 229 oils, butters & waxes with full fatty acid profiles
- Cold process, hot process, bastille, castile — any recipe type
- NaOH, KOH, or mixed-alkali recipes
- IFRA Category 9 fragrance safety checks
- Cure-time estimates with calendar reminders
- Cost tracking and sell-price calculation
- iCloud sync across your Mac, iPad, and iPhone