The Art & Science of
Perfect Soap
Precision lye calculations, intelligent oil blending, and guided workflows for Cold Process,
Hot Process, Liquid Soap, and Melt & Pour. Everything you need, from first batch to thousandth.
Everything for Every Soap Maker
From your first batch to your thousandth, Soaper provides the precision and guidance you need.
Precise Lye Calculations
Automatic NaOH and KOH calculations with support for dual-lye formulations. Three water calculation methods: percentage of oils, lye concentration, or water-to-lye ratio.
- NaOH for bar soap, KOH for liquid soap
- Dual-lye blends with any ratio
- Superfat adjustments from 0-20%
- Percentage or weight-based entry
- Live quality predictions as you adjust
Comprehensive Ingredient Library
Access detailed data for 84 oils with complete fatty acid profiles and saponification values, plus 117 additives, 33 fragrances, 31 colorants, and 44 trusted suppliers.
- 8 fatty acids tracked per oil
- NaOH and KOH sap values
- Usage guidelines for additives
- Scent profiles for fragrances
Professional PDF Export
Generate beautiful, professional documents for your workshop, records, or customers. Choose from 9 different export formats.
- Workshop Checklist for batch day
- Recipe Specification for records
- Customer Marketing sheets
- Display Cards, Price Tags, Product Info Cards & more
Blend Lab
Your intelligent oil blending workspace. 12 real-time quality metrics, smart optimization, and quality-based oil discovery help you craft the perfect formula.
Oil Balance
Saturated to unsaturated fat ratio
Bar Longevity
How long bars last in the shower
Cure Time
Predicted cure duration by oil profile
Foam Speed
How quickly lather develops
Gentleness
Moisturizing and skin-friendly
Fluffy Lather
Large, airy bubble quality
Creamy Lather
Dense, stable foam quality
Set Speed
Bar firmness at unmolding
Stability Boost
Lather bubble longevity
Shelf Life
Dreaded orange spots risk
Unsaturation
Iodine value at a glance
INS Value
Classic hardness benchmark
Optimize For
Choose what matters most - Balanced, Oil Balance Score, Bar Longevity, Gentleness, Large Bubbles, Creamy Lather, or Set Speed. The algorithm adjusts your blend to hit your target.
Quality Filter Pills
Filter and sort available oils by the qualities you want. Multi-select targets and toggle direction to find oils that boost or temper specific qualities.
Intelligent Optimization
Gradient descent algorithm with three intensity levels - Gentle, Moderate, or Aggressive. Baseline-reset system ensures predictable, undoable results every time.
Real-Time Feedback
Contextual blend feedback shows what your recipe needs. See predicted quality changes before adding each oil, with fit scores ranking the best options.
Blend History
Save your experimental blends and revisit them later. Convert any blend directly into a full recipe with one tap when you're ready to commit.
Smart Feedback Toasts
After each optimization, get clear explanations of what changed and why. If optimization was limited, see exactly which constraints were hit.
Multi-Process Soap Making
Soaper supports four process types end-to-end, each with its own tailored batch flow, calculations, and guidance.
Cold Process
The classic bar-soap craft. Saponify oils with sodium hydroxide and cure for a long-lasting bar.
Hot Process
Cook the saponification in real time. Use the bar within days instead of weeks, with rustic texture.
Liquid Soap
Potassium hydroxide formulations with paste-weight calculations, built for shampoo, body wash, and hand soap.
Melt & Pour
Pre-saponified base work with colorant and fragrance guidance scaled to your batch.
Batch Tracking That Grows With You
Two distinct experiences designed for different skill levels and needs.
Beginner Mode
7-phase guided workflow with educational content
- 1 Preparation
- 2 Lye Solution
- 3 Melt Oils
- 4 Check Temperatures
- 5 Mixing
- 6 Molding
- 7 Curing
- Educational content at each step
- Safety reminders and lye handling guidance
- Built-in timers with push notifications
- Ingredient and requirements checklists
- Photo prompts to document your batch
Advanced Mode
3-stage streamlined workflow
- 1 Preparation & Mixing
- 2 Molding
- 3 Curing & Finishing
- All 7 beginner steps, condensed into 3 stages
- Multiple simultaneous timers
- Jump between stages freely
- Photo documentation at each stage
Photos & Documents on Every Recipe
Attach photos and files to recipes, oils, fragrances, colorants, additives, and suppliers — straight from your camera, photo library, or the Files app.
Document the Bar
Capture every batch — the swirl, the unmold, the cured bar — and tie it to the recipe that made it.
Keep SDS & Invoices
File safety data sheets next to your oils, supplier invoices next to your suppliers, and find them when audit time comes.
Synced & Searchable
Attachments ride along with iCloud, so the picture you took on your iPhone is right there on your iPad too.
Smart Add-Ins & Cost Insights
Soaper sees your whole recipe — oils, lye, every additive, colorant, and fragrance — and scales the amounts to your batch.
Auto Additives, Colorants & Fragrances
Honey, clay, essential oils, micas — Soaper calculates how much you need for the batch in front of you. Tap any ingredient to see where the amount came from.
Per-Row Units
Pick the unit you actually measure in — grams, ounces, or milliliters — on every row, and see the equivalent in the opposite unit right beside it.
Skin-Safe Fragrance Guardrails
A gentle warning when a fragrance blend pushes past skin-safe levels — and process-aware recommendations that know Cold Process from Hot Process from Liquid Soap.
Recipe Cost & Cost-per-Bar
Premium tier. Estimated batch cost and cost-per-bar reflect every line in the recipe — oils, lye, water alternative, and every add-in — for a true picture of what each bar takes.
Smart Inventory Management
Track every oil, butter, fragrance, and additive. Know what you have, what you need, and what it costs.
-
Stock Tracking Monitor quantities with low-stock warnings
-
Recipe Intelligence See which recipes you can make, which need one ingredient, and what to buy next
-
Shopping Integration Build shopping lists from recipes, track costs at purchase, and auto-restock inventory
-
Supplier Directory Browse 44 pre-loaded suppliers with websites and contact info
iCloud Sync
Your recipes, inventory, and batch history are backed up to iCloud automatically. Works offline too — changes sync when you reconnect.
What’s New in Soaper
Soaper grows with the soap-making community. Here’s what landed in the last few releases.
Version 1.3.1
Smoother under the hood
Small refinements and behind-the-scenes improvements to keep your soap-making running smoothly.
Version 1.3.0
Photos, smart add-ins, and full-recipe cost
Attach photos and documents to recipes, oils, fragrances, colorants, additives, and suppliers. Auto Additives, Colorants, and Fragrances scale honey, clay, and essential oils to your batch weight. Skin-safe fragrance guardrails. Per-row units (g, oz, ml) with side-by-side conversions. Premium adds Estimated Cost per recipe — covering oils, lye, and every add-in.
Version 1.2.0
Multi-process soap making arrives
Cold Process, Hot Process, Liquid Soap (KOH), and Melt & Pour — each with its own batch flow, quality metrics, and guidance. New liquid-soap additives including preservatives and thickeners. Process-type filtering in the additive library.
Version 1.1.1
Now on iPad
Soaper opens up across the iPad screen — sidebars, side-by-side editing, and a comfortable space for blending and batch days.
Ready to Create Your
Perfect Soap?
Join soap makers who trust Soaper for precision, guidance, and beautiful results.
