Soap Making Calculator -Soapie

The only iPhone soap calculator with built-in batch tracking, cure monitoring, and cost-per-bar — all offline, works on your device.

The soap calculator that actually works on your phone.

Formulate recipes, calculate lye, track batches, monitor cures, and know your cost per bar — all in one app that works offline. No account required. Your data stays on your device.

PRECISE LYE & OIL CALCULATIONS

172 oils with verified SAP values and full fatty acid profiles. Support for NaOH, KOH, and hybrid lye blends with purity adjustment. Three water methods: water-as-percent-of-oils, lye concentration, and water-to-lye ratio. Citric and lactic acid compensation built in.

RECIPE BUILDER

Build recipes by percentage or weight. Set soap type, process method, superfat, and batch size. See fatty acid profiles and soap property estimates as you build. Save, duplicate, and version your recipes — old versions are preserved exactly as you saved them.

STEP-BY-STEP MAKE MODE

Weigh each ingredient with real-time deviation tracking. Green, orange, and red indicators show you how close you are to target. Record notes and photos at every step. Never wonder "did I add the coconut oil?" again.

CURE TRACKING

Automatic cure countdowns with ready-date estimates. Check in on batches with notes and photos. See your full cure board at a glance — which batches are curing, which are ready.

COST PER BAR

Link ingredients to your inventory with real purchase prices. The app calculates your actual cost per batch and cost per bar using FIFO consumption. No more spreadsheets or $20 Etsy templates.

INVENTORY & SUPPLIERS

Track oils, butters, lye, fragrances, and additives with supplier info, purchase lots, and stock levels. Know what you have on hand and what it costs.

BUILT FOR YOUR WORKSHOP

• Works completely offline — no internet required
• Your recipes, batches, and inventory live on your device
• No account required for any feature
• Export recipes as PDF or share via QR code
• Import recipes from photos with OCR
• Home screen widgets for quick access
• Upgrade once to unlock every Pro feature

172 oils. Zero guesswork. From formulation to finished bar.