Best Soap Calculator Apps

245+ iOS apps curated and reviewed

4.2 avg rating
14 free apps
Updated August 2026

Out of 245+ soap calculator apps on iOS, 14 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Compare top Soap Calculator Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Soapmaking Friend – Soap CalcSoapmaking Friend – Soap CalcFree4.6★ (86)YesYesAug 2026
2Simple SoapCalc – Soap CalcSimple SoapCalc – Soap CalcFree4.9★ (10)NoYesAug 2026
3Soap Calculator: Lye & RecipeSoap Calculator: Lye & RecipeFree5.0★ (5)NoYesAug 2026
4SoapCraft: Soap CalculatorSoapCraft: Soap CalculatorFreeNoYesJul 2026
5Soaper - Soap CalculatorSoaper - Soap CalculatorFree5.0★ (3)YesYesAug 2026
6Handmade Soap Calculator LiteHandmade Soap Calculator LiteFree2.3★ (6)YesYesMay 2026
7Handmade Soap CalculatorHandmade Soap Calculator$2.993.0★ (1)YesNoJul 2026
8Soapah: Soap Making CompanionSoapah: Soap Making CompanionFree5.0★ (2)YesYesMay 2026

Top Picks for Soap Calculator

Soapmaking Friend – Soap Calc#1

Soapmaking Friend – Soap Calc by Brewer's Friend

Soap & lye calculator
Editor's Choice
🌟 Lifestyle
4.6(86 ratings)
FreeAdsIn-App Purchases
Soapmaking Friend – Soap Calc screenshot 1
Soapmaking Friend – Soap Calc screenshot 2
Soapmaking Friend – Soap Calc screenshot 3
Soapmaking Friend – Soap Calc screenshot 4
Soapmaking Friend – Soap Calc screenshot 5
Soapmaking Friend – Soap Calc screenshot 6

This app is a comprehensive toolkit for soap makers, offering advanced calculators for lye and soap recipes. It helps manage inventory, track batch production with cost analysis, and provides access to a community recipe database and forum for support.

Simple SoapCalc – Soap Calc#2

Simple SoapCalc – Soap Calc by James Hogans

Soap & Lye Calculator
Strong Contender
🔧 Utilities
4.9(10 ratings)
FreeIn-App Purchases
Simple SoapCalc – Soap Calc screenshot 1
Simple SoapCalc – Soap Calc screenshot 2
Simple SoapCalc – Soap Calc screenshot 3
Simple SoapCalc – Soap Calc screenshot 4
Simple SoapCalc – Soap Calc screenshot 5
Simple SoapCalc – Soap Calc screenshot 6

This app helps soap makers calculate precise lye and water amounts for various soap recipes. It can import recipes from images, suggest oil blend refinements, and guide users through the soap-making process with a step-by-step checklist. It aims to simplify and clarify the soap-making experience.

Soap Calculator: Lye & Recipe#3

Soap Calculator: Lye & Recipe by Panda Taps LLC

Saponification & Cure Tracker
Worth Considering
🌟 Lifestyle
5.0(5 ratings)
FreeIn-App Purchases
Soap Calculator: Lye & Recipe screenshot 1
Soap Calculator: Lye & Recipe screenshot 2
Soap Calculator: Lye & Recipe screenshot 3
Soap Calculator: Lye & Recipe screenshot 4
Soap Calculator: Lye & Recipe screenshot 5
Soap Calculator: Lye & Recipe screenshot 6

This app helps handmade soap makers calculate precise lye and water weights for various soap types. It provides detailed fatty-acid profiles, predicted bar properties, and generates FDA-style ingredient labels. It also includes batch tracking and a cure timer with lock screen widgets.

More Soap Calculator apps to explore

4
SoapCraft: Soap Calculator
SoapCraft: Soap Calculator
SoapCraft: Soap Calculator
Lye Calculator & Recipes
Free
🔧 Utilities
(0)
5
Soaper - Soap Calculator
Soaper - Soap Calculator
Soaper - Soap Calculator
Soap Recipe Calculator
Free

Simplify soap making with instant lye calculations and real-time quality metric updates. Features a blend lab for oil experimentation, guided batch tracking, and inventory management. Avoid manual math and spreadsheets for better soap creation.

Automatic lye calculations10 quality metricsExtensive oil and fragrance database
🌟 Lifestyle
(3)
free with in-app purchases
6
Handmade Soap Calculator Lite
Handmade Soap Calculator Lite
Handmade Soap Calculator Lite
by ABT Co., Ltd.
Free

This app helps original soapmakers calculate precise amounts of sodium hydroxide and water based on chosen oils and their weights. Save your calculations as recipes and generate detailed reports with additional information and photos.

Calculate sodium hydroxide amountCalculate water amountSave oil and sodium hydroxide amounts as recipes
🌟 Lifestyle
(6)
free with in-app purchases
7
Handmade Soap Calculator
Handmade Soap Calculator
Handmade Soap Calculator
by ABT Co., Ltd.
$2.99

This app simplifies original soapmaking by calculating precise amounts of sodium hydroxide and water based on chosen oils and their weights. Save your calculations as recipes and generate detailed reports with photos and environmental data.

Calculate sodium hydroxide and water amountsAdd custom oils to the databaseSave calculations as recipes
🌟 Lifestyle
(1)
paid
8
Soapah: Soap Making Companion
Soapah: Soap Making Companion
Soapah: Soap Making Companion
Lye calculator, Planner
Free

This app simplifies soap making with a lye calculator, batch tracker, and inventory management. It offers free recipes, a learning center, and cost calculation per batch and bar. Ideal for hobbyists and small businesses.

Lye calculator for precise recipesBatch tracking and cost calculationIngredient inventory management
💼 Business
(2)
free with in-app purchases
9
Soap Calculator - Lye & INS
Soap Calculator - Lye & INS
Soap Calculator - Lye & INS
Recipe formulator & tracker
$2.99

This app helps handmade soap makers formulate recipes, calculate costs, and evaluate properties. It offers real-time recipe evaluation, smart scoring with skin type suggestions, and supports both solid and liquid soap calculations. It's a privacy-first, one-time purchase tool with no subscriptions or ads.

Real-time recipe evaluationSmart recipe scoring & INS suggestionsSolid & liquid soap support
🌟 Lifestyle
(2)
paid
10
Soap Making Calculator -Soapie
Soap Making Calculator -Soapie
Soap Making Calculator -Soapie
Lye Calculator, Batch Tracker
Free

This app helps soap makers precisely calculate lye and oil ratios, build recipes, track batches through curing, and monitor costs. It works offline, keeping your data private on your device.

Precise lye and oil calculationsRecipe builder with fatty acid profilesStep-by-step make mode with deviation tracking
🌟 Lifestyle
(1)
free
11
SaponiCalc
SaponiCalc
SaponiCalc
Soap Calculator
$1.99

This application assists in formulating traditional handmade soap recipes. Users can create custom oil and lye mixes for personalized soap bars, with features for saving, editing, and organizing recipes.

Formulate handmade soap recipesCalculate oil and lye ratiosSave and edit favorite recipes
🌟 Lifestyle
(149)
free
12
Soap Recipe & Lye Calculator
Soap Recipe & Lye Calculator
Soap Recipe & Lye Calculator
Cold Process Saponification
Free
🔧 Utilities
(0)
13
Unit Converter - Pro Units App
Unit Converter - Pro Units App
Unit Converter - Pro Units App
Convert Any Unit
Free

This app offers a powerful and user-friendly unit converter with 16 categories, including currency, length, and temperature. It allows for custom unit lists and provides live exchange rate updates for 148 currencies. Unlock all features with a one-time in-app purchase.

16 conversion categoriesCustom unit listsLive currency exchange rates
🔍 Reference
(16K)
free with in-app purchases
14
Candle & Soap Calculator
Candle & Soap Calculator
Candle & Soap Calculator
Lye, wax & fragrance recipes
Free
🔧 Utilities
(0)
15
Trace: Soap & Lye Calculator
Trace: Soap & Lye Calculator
Trace: Soap & Lye Calculator
Cold process recipes & cure
Free
🔧 Utilities
(0)
16
SoapDIY-Soap Recipe Calculator
SoapDIY-Soap Recipe Calculator
SoapDIY-Soap Recipe Calculator
by CHING FENG WANG
$5.99

Calculate precise lye, water, and quality metrics for handmade soap recipes. Features instant saponification, superfat correction, and a quality radar with recommended ranges for 59 oils. Save, manage, and export your recipes.

Instant saponification calculation (NaOH/KOH)Automatic superfat correctionFlexible water settings
🌟 Lifestyle
(0)
paid
17
Soap Lye Calculator - Trace
Soap Lye Calculator - Trace
Soap Lye Calculator - Trace
Batch Tracker & Cure Journal
Free
🌟 Lifestyle
(0)
18
Saponify
Saponify
Saponify
by bryan costanich
Free

This app simplifies soap-making by handling all the complex calculations for you. It allows you to store and modify your recipes, ensuring accuracy and ease of use for both beginners and experienced crafters.

Lye and lipid calculatorCalculate by ingredient percentage or weightSupports hard and soft soap lye
📚 Education
(1)
free
19
Calculator ∞
Calculator ∞
Calculator ∞
The Best Scientific Calculator
$5.99

This advanced calculator app offers a powerful math core and algebra engine for basic to complex calculations. It includes features like step-by-step solutions, handwriting recognition, and 2D graphing, making it suitable for students, engineers, and programmers.

Step-by-step solution hintsMath Photos SolverHandwriting Recognition
📚 Education
(6.3K)
free with in-app purchases
20
Candle Batch Calculator
Candle Batch Calculator
Candle Batch Calculator
Wax and fragrance math
$0.99
🔧 Utilities
(0)

FAQ about Soap Calculator

What are the best soap calculator apps for iPhone?
Soapmaking Friend – Soap Calc tops our soap calculator apps ranking as of August 2026, with a 4.6-star average from 86 App Store ratings, and it's free to download.
Yes — 14 of the top soap calculator apps we rank are free to download, including Soapmaking Friend – Soap Calc and Simple SoapCalc – Soap Calc.
Soapmaking Friend – Soap Calc shows ads and offers in-app purchases, according to its App Store listing as of August 2026.
We track 245+ soap calculator apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
Soapmaking Friend is a comprehensive mobile application designed for soap makers. It provides advanced calculators for creating accurate lye and soap recipes, helps manage inventory and suppliers, tracks batch production with cost analysis, and offers access to a community recipe database and forum.
Key features include advanced liquid and bar soap calculators with full saponification support, a smart recipe builder that allows for detailed notes, inventory and supplier tracking, batch creation with automatic cost breakdowns, a public recipe database, and a community forum for support and learning.

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