Fantastic App!!!
Response from developer
Thank you so much! I’m so glad you love it!

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.
1.4.0
July 7, 2026
Your inventory now tells the whole story of every purchase. Tap any ingredient to open its new detail screen: see your total on hand, what your stock is actually worth (valued by what you paid for each purchase), and a clear list of every purchase — each with its own brand, price, currency, and date. The oldest purchase is marked “Used next,” so you always know what gets used first, and you can see which batches drew from a given purchase. Buying in more than one currency? Soaper now records each purchase in the currency you paid and keeps your totals honest — grouped by currency, with no hidden conversions. New: Adjust stock. Correcting an amount now tells you exactly what it does — record a correction, or draw down your oldest purchases — instead of changing things behind the scenes. Add a purchase any time you buy more, even the same ingredient at a different price, and Soaper keeps it all straight. Plus refinements throughout. Thanks for being part of the Soaper community.
MoreAd-free with inventory tracking and guided batches!
$79.99
Soaper Premium — Lifetime
Every Premium feature. One-time purchase.
Thank you so much! I’m so glad you love it!
Yes, Soaper contains advertisements. The app is free to download and use, with optional premium features available for purchase.
Soaper Premium unlocks guided batch flows, inventory management, shopping lists, and supplier tracking. A 2-month free trial is available for annual plans.
Soaper provides automatic lye calculations for NaOH and KOH, and tracks 10 quality metrics like hardness and gentleness. It uses over 180 oils with complete fatty acid profiles and saponification values.
Yes, Soaper offers a Beginner Mode with a 7-phase guided workflow that explains each step of the soap making process, including safety setup and lye mixing.
Soaper is available on iPhone, iPad, and Apple Watch, allowing you to manage your soap making on multiple devices.
The latest version of Soaper is 1.1.2, last updated on March 19, 2026. Updates typically include new features and bug fixes.
Soaper calculates 10 quality metrics including Oil Balance Score, Foam Speed, Skin Gentleness, Fluffy Lather, Creamy Lather, Set Speed, Bar Longevity, Cure Time, Lather Stability, and Shelf Life Risk.
Soaper allows you to track on-hand quantities for all ingredients, receive low-stock alerts, and automatically deduct ingredients when you start a batch, eliminating manual math.