Cross Multi - Rule of Three
A cross multiplication calc
Free · Designed for iPad. Not verified for macOS.
Master the rule of three instantly! Solve proportions, visualize step-by-step math cross-multiplications, and track your calculation history with a futuristic UI.
Struggling with proportions, scaling, or finding that missing value? Say hello to the ultimate Cross Multiplication & Rule of Three calculator. Whether you are scaling a recipe, converting currencies, solving physics problems, or just doing quick everyday math, this app delivers instant answers with absolute clarity.
Unlike standard calculators, this app doesn't just give you the final number—it completely deconstructs the math so you can see exactly how the formula works.
### WHY CHOOSE THIS APP?
* **Visual Rule of Three Grid:** Input your known values into an intuitive, cross-linked layout and watch the app isolate the unknown variable instantly.
* **Step-by-Step Breakdowns:** Tap solve to reveal the full algebraic breakdown: the initial setup equation, the cross-multiplication product, the final division step, and the final answer.
* **Smart History Log:** Never lose track of your work. Every calculation is automatically logged with a traditional ratio string notation alongside the exact timestamp.
* **One-Tap Copy:** Effortlessly copy your final results to your clipboard to paste them into messages, notes, or documents.
* **Futuristic & Clean UI:** Experience a gorgeous, dark-mode design with glowing neon accents designed for high contrast and seamless usability.
### PERFECT FOR:
* **Students & Teachers:** Visualizing algebraic ratios and understanding the step-by-step logic behind cross-multiplication.
* **Designers & Developers:** Quickly calculating aspect ratios, scaling UI elements, or converting screen dimensions.
* **Chefs & Bakers:** Scaling ingredient portions up or down effortlessly.
* **Travelers & Shoppers:** Handling custom currency conversions or comparing unit prices on the fly.
Simplify your math today. Download Cross Multiplication - Rule of Three and get calculating in seconds!
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The developer, Ornicus, 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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Ornicus s.r.o.
- Size
- 3.4 MB
- Category
- Utilities
- Compatibility
Requires iOS 26.5 or later.
- iPhone
Requires iOS 26.5 or later. - iPad
Requires iPadOS 26.5 or later. - Mac
Requires macOS 26.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.5 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Ornicus