SoapDIY-Soap Recipe Calculator

Lye calc, recipes & quality

$5.99 · Designed for iPad. Not verified for macOS.

Rebuilt in SwiftUI: instant lye calculation, quality radar, batch log with cure reminders, and 59 oils. The best calculator for making handmade soap. Enter your oil recipe and instantly get the lye, water, and quality metrics you need. Key features • Instant saponification: solid soap (NaOH) and liquid soap (KOH), by ratio or weight • Correct superfat: automatically applied to the lye amount (fixes a common mistake) • Flexible water settings: lye concentration / water-to-lye ratio / % of oils, default 33% • KOH purity: liquid soap auto-converts to the real amount by purity (default 90%) • Quality radar: hardness, cleansing, conditioning, bubbly, creamy — with recommended ranges • 59 built-in oils with verified SAP and fatty-acid data • Custom oils: add your own oils and fatty-acid profiles • Recipe management: save, search, share, export to PDF • Batch log: record each batch with photos and get an automatic cure reminder • Dark mode, Dynamic Type, and an iPad two-column layout Safety Wear goggles and gloves and keep the area ventilated when handling sodium/potassium hydroxide. This app is for calculation reference; always follow proper safety procedures.

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Rebuilt entirely in SwiftUI: instant calculation, quality radar, batch log with cure reminders, PDF export, and iPad layout — plus corrected superfat math and oil data.

Version 5.0

The developer, CHING FENG WANG, 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.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • CHING FENG WANG
    Size
    • 6.2 MB
    Category
    • Lifestyle
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English and 3 more
    • English, Japanese, Simplified Chinese, Traditional Chinese
    Age Rating
    4+
    Copyright
    • © MomoSoft
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

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