Soap Lye Calculator vs MetricSmith
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Soap Lye Calculator
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Create perfectly balanced soap recipes with confidence. Soap Lye Calculator is a precise and easy-to-use tool designed for soap makers who want reliable results every time. Whether you're crafting your first batch or refining advanced formulations, this app helps you calculate accurate lye amounts, adjust oil ratios, and build custom recipes with ease. No more guesswork. No more wasted batches. Powerful Features Accurate Lye Calculations Calculate exact NaOH and KOH amounts based on your chosen oils and superfat levels. Get safe, reliable results every time. Custom Oil Blends Create and adjust recipes using multiple oils. Fine-tune your formulations to achieve the perfect balance of hardness, cleansing, and conditioning. Real-Time Updates Instantly see how changes affect your recipe. Modify oil weights, percentages, or lye concentration and get immediate feedback. Beginner-Friendly, Expert-Ready Simple enough for beginners, powerful enough for experienced soap makers and professionals. Clean & Focused Design A calm, distraction-free interface designed to help you focus on your craft. Why Choose Soap Lye Calculator? Soap making is both a science and an art. Precision matters—and small mistakes can ruin an entire batch. This app gives you the tools to work accurately and confidently, so you can focus on creativity instead of calculations. Perfect For • Cold process soap makers • DIY skincare enthusiasts • Handmade business owners • Hobbyists and professionals Make Better Soap Experiment with new ideas, refine your formulas, and create high-quality soap with consistent results. Simple. Precise. Made for soap makers.
MetricSmith
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MetricSmith — Complete Measurement Tools MetricSmith is a clean, fast, and accurate unit converter built for people who work with numbers every day. Whether you're studying, working with technical data, or handling everyday measurements, MetricSmith provides a focused workspace designed for clarity, speed, and reliability. The minimalist interface keeps distractions away so you can get the right value instantly. Why MetricSmith MetricSmith is built for accuracy and consistency. Units are verified, categories are organised for quick access, and the workflow supports both simple checks and advanced calculations. It’s designed for students, professionals, researchers, analysts, and everyday users who need dependable results. The app adapts naturally to different workflows, from quick one‑off conversions to long technical sessions. New in This Version MetricSmith now includes expanded scientific energy and power conversions, including earthquake energy, TNT yield, and multiple engineering power systems. These additions integrate seamlessly into the existing interface and remain easy for general users while offering depth for technical work. The conversion engine has also been refined for smoother numeric input and more stable performance. Free Version Essential everyday conversions: Metric and imperial units Length, area, volume, mass, temperature, speed Chinese Weight (市制) — 钱, 两, 斤 Instant results Smart search Saved Conversions Light and Dark themes Everything needed for daily conversions is free. Lifetime Access Unlock advanced tools for professional and scientific workflows: Custom units and categories Batch Mode Widgets History Export Advanced themes Pro‑only categories and units One‑time purchase. Pro‑Only Categories Specialised units for engineering, science, and industry: Energy and Oil CO₂ Emissions Underwater and Altitude Pressure Physics and Chemistry Chinese Weight and Volume Systems Astronomical Units Advanced Engineering and Speed Units Agriculture and Industry Ideal for engineering, lab work, research, energy markets, and analysis. Chinese Measurement Systems A complete library of modern and traditional Chinese units for engineering, trade, cultural research, and historical study. Features Hundreds of units across dozens of categories Clean, organised layout Fast, accurate results Custom units and categories Reorder categories Saved Conversions History Export Batch Mode Convert multiple values at once — perfect for spreadsheets, lab work, and bulk calculations. Widgets Pin any category or custom unit to your Home Screen for instant access. Design Philosophy MetricSmith is built for clarity and long‑term usability. The layout is simple, the typography is readable, and every interaction is designed to reduce friction. Whether you’re converting a single value or working through detailed calculations, the app stays responsive, predictable, and easy to use. About MetricSmith MetricSmith is built for people who value clarity and precision. The app focuses on thoughtful design, reliable results, and a workflow that feels natural whether you’re converting a single value or working through detailed calculations. Every category is organised to reduce friction, every interaction is tuned for speed, and every feature is designed to support both everyday tasks and professional work. MetricSmith aims to be a dependable tool you can rely on across study, work, research, and daily life. Privacy‑First Your data stays on your device. Privacy Policy: https://www.bamuda.com.au/metricsmithprivacy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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Verdict
The clearest difference is price: MetricSmith at Free against Soap Lye Calculator's $3.99. MetricSmith also leads on update cadence (every 4 days vs every 3 months). Soap Lye Calculator's advantage is in-app purchases (none vs 1) and iOS requirement (15.1 vs 17.6). On ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
MetricSmith is free to download; Soap Lye Calculator costs $3.99 up front. MetricSmith sells 1 one-off in-app purchase. Soap Lye Calculator asks for nothing beyond the download.
Soap Lye Calculator ships an update every 3 months, MetricSmith every 4 days. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.
| Parameter | Soap Lye Calculator | MetricSmith |
|---|---|---|
| Price | $3.99 | Free — better |
| Update frequency | Every 3 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 17.6 |
| Further details — not scored | ||
| Size | 34 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Jelmer van Nuss | Bamuda Corporation Pty Ltd |
In-app purchases
Soap Lye Calculator
No in-app purchases
MetricSmith
- MetricSmith Life Access$6.99
Questions
Is Soap Lye Calculator free?
Is MetricSmith free?
Do Soap Lye Calculator or MetricSmith have ads?
Which is updated more often, Soap Lye Calculator or MetricSmith?
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