Soap Calculator - Lye Calc
INS & SAP·Superfat·oz/lb
$2.99 · Designed for iPad
no subscription, Lye calculator for soapmaking: INS & SAP, 180 oils, superfat, additives, and oz/lb units. Save recipes locally. No ads, no tracking.
Soap Calculator - Lye Calculator for Soapmaking
Make soap with confidence. Soap Calculator is a fast, privacy-first lye calculator that helps you build accurate recipes in seconds with clear, reliable results.
Key Features
• Lye & Water Calculator - NaOH/KOH, water, and recipe totals calculated instantly
• INS & SAP Values - Quick calculations to help evaluate your recipe
• 180 Oils Database - Built-in saponification values for common oils and butters
• Superfat (Lye Discount) - Flexible safety discount settings for different batches
• Additive Management - Maintain and reuse additives across recipes
• Dual Input + oz/lb - Work in percentages or weights, with oz/lb units
Recipe Tools
• Save, favorite, rename, and review your recipe history
• Keep your formulas organized for repeatable batches
Core Advantages - Why Choose Us?
• Zero Ads, No Tracking - Designed for privacy-first local use
• One-Time Purchase - No subscriptions
• Cross-Platform - Use on iPhone, iPad, and Mac
Professional Features
1. 【Precision Calculation Engine】
Automatically calculates INS value, NaOH/KOH amount, and water requirements. Supports lye purity adjustment (90%-100%), custom water ratio (2.0-3.0x), and lye discount (safety discount) settings.
2. 【Massive Oil Database】
Built-in complete data for 180 oils. Each oil has detailed property descriptions and saponification values to help create ideal recipes.
3. 【Smart Recipe Management】
• Recipe Save & Share - Permanently save creative recipes
• Favorite Pin Function - One-click pin for frequently used oils
• Recipe Rename - Personalized management
• Additive Management - Maintain and reuse additives across recipes
• History Review - Easy review of making journey
4. 【Making Guidance Tutorials】
From basic knowledge to advanced techniques, comprehensive guidance for soap making. Includes detailed processes and professional safety reminders.
5. 【User Experience Optimization】
• Intuitive Clean Interface - Focus on calculation experience
• Real-time Input Validation - Smart prompts to avoid errors
• Multi-language Support - Simplified Chinese, Traditional Chinese, English
Target Users
• DIY Soap Making Enthusiasts - Ideal assistant for home making
• Professional Soap Studios - Reliable tool for commercial recipes
• Chemistry Educators - Practical software for teaching
• Beauty & Skincare Experts - Customize exclusive formulas
Start Your Soap Making Journey
Whether moisturizing facial soap or powerful cleaning soap, Soap Calculator provides scientifically accurate recipe support. Let professional tools fulfill your creative inspiration!
User Reviews
"Support weight and percentage switching, sometimes when I want to change oil amount, just change a number, very flexible" - QiuQiu1004
"The interface is clean without ads, this is much better than other tools, feels good to use." - BigFaceDing
"When I started making handmade soap, I always miscalculated lye amount, after using this app I never failed, a blessing for beginners!" - XiaoYiGe
Popular Recipes
• Shea Butter Moisturizing Soap - Classic combination of olive oil + coconut oil + palm oil + shea butter
• Moisturizing Bar - Nourishing formula with shea butter and glycerin
• Rosemary Mint Refreshing Soap - Refreshing formula with rosemary and mint essential oils
• Coffee Exfoliating Soap - Energizing exfoliating formula with coffee grounds, suitable for normal and oily skin
Professional Data
Data from authoritative chemical databases:
• SAP Values - Accurate to 3 decimal places
• INS Formula - Based on classic chemical theory
• Oil Properties - Hardness, cleansing power, foam
• Safety Data - International safety standards compliant
Continuous Updates
We promise continuous optimization:
• Regular new oil data addition
• Feature optimization and performance improvement
• Quick user feedback response
• Latest system compatibility support
Download Soap Calculator, start your professional soap making life!
Ratings & Reviews
1. Added language switcher in the settings
2. Added recipe image sharing feature
3. Fixed known issues, improved stability, and refined the UI
The developer, 瑜 张, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 瑜 张
- Size
- 2.7 MB
- Category
- Lifestyle
- Compatibility
Requires iOS 16.6 or later.
- iPhone
Requires iOS 16.6 or later. - iPad
Requires iPadOS 16.6 or later. - Mac
Requires macOS 13.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
English and 2 more
- English, Simplified Chinese, Traditional Chinese
- Age Rating
4+
- 4+
- Copyright
- © 张瑜
