# Soap Recipe & Lye Calculator — Cold Process Saponification

> Cold Process Saponification (iPhone/iPad app by Ralf Pitter.)

- Source: https://appshunter.io/ios/app/soap-recipe-and-lye-calculator/id6789507073 (this page in markdown: same URL + `.md`)
- Developer: [Ralf Pitter](https://appshunter.io/developer/1148428044)
- Category: Utilities, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 13.0 · 29 MB
- Languages: English
- Released: 2026-07-21
- Data updated: 2026-09-02
- User reviews in markdown: https://appshunter.io/ios/app/soap-recipe-and-lye-calculator/id6789507073/reviews.md

## What is Soap Recipe & Lye Calculator?

Make soap with confidence. Soap Recipe & Lye Calculator does the one calculation
every batch depends on — the exact lye — and shows you how the finished bar will turn
out, before you pour.

Add your oils and butters, and instantly see:
• Precise lye (NaOH) and water for your batch, with your superfat and water settings
• A live quality readout — hardness, cleansing, conditioning, bubbly & creamy lather,
  plus iodine and INS — so you can balance a recipe before you make it
• Everything in grams, ounces, or percentages, with a library of 50 oils and butters

Go further with a one-time Pro unlock:
• Liquid soap (KOH) mode with lye purity
• Fragrance & essential-oil calculator
• Save and name unlimited recipes, with notes
• Resize any batch to your mold
• Export a clean, printable recipe sheet (PDF) to save or share

Why makers like it:
• Fast, beautiful, and works 100% offline — your recipes stay on your device
• Trustworthy oil data, aligned to established soapmaking references (see Data & Sources)
• One-time purchase. No subscription, no account, no clutter.

SAFETY: Lye is caustic. Always wear gloves and eye protection, add lye to water (never
water to lye), and make a small test batch — SAP values vary by oil source. This app is a
formulation aid; safe handling is your responsibility.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Unlock | $8.99 | one-time |



## Version history (last 1 release)

### 1.0.0 — 2026-07-20

No release notes.

## More apps by Ralf Pitter

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All apps by Ralf Pitter: https://appshunter.io/developer/1148428044

## Related topics

[lye calculator](https://appshunter.io/ios/topics/lye-calculator) · [soap making](https://appshunter.io/ios/topics/soap-making) · [soap lye calculator](https://appshunter.io/ios/topics/soap-lye-calculator) · [froid](https://appshunter.io/ios/topics/froid) · [handmade soap calculator lite](https://appshunter.io/ios/topics/handmade-soap-calculator-lite) · [gardco viscosity calc](https://appshunter.io/ios/topics/gardco-viscosity-calc)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-02.*