Formulo

Formulo lets you build custom calculators powered by mathematical formulas.

📚 100+ READY-TO-USE TEMPLATES
Not sure where to start? Browse a library of over 100 pre-configured calculators in English and French: health, finance, construction, cooking, science, and more.
One tap to import — instantly ready to use.

🧮 YOUR OWN CALCULATORS
Create as many calculators as you need: BMI, unit cost, compound interest, unit conversion, project quotes, recipes…
Each calculator has its own name, variables, formula, and result unit.

📐 INTUITIVE GESTURE NAVIGATION
• Swipe up → access and edit your variables
• Keep swiping up → open the calculator editor
• Swipe left / right → switch to the next or previous calculator

🔢 POWERFUL MATH ENGINE
Powered by mathjs, Formulo supports complex formulas:
• Basic operations: +, -, *, /, powers (^)
• Functions: sqrt, abs, sin, cos, log, round…
• Examples: weight / height^2 | (price * qty) * (1 - discount/100) | PI * r^2

✈️ 100% OFFLINE
No internet connection required. No account. No subscription.
All your data is stored locally on your device.

🎯 CLEAN INTERFACE
One result per screen, natural gestures, instant recalculation.
Formulo stays out of your way so you can focus on what matters.

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FEATURES

• Create and edit custom calculators
• Library of 100+ pre-configured calculators (EN & FR)
• Named variables with unit and default value
• Expressive mathematical formulas
• Result displayed with configurable unit
• Customizable decimal places per calculator
• Drag-and-drop reordering
• Automatic local save
• Fully gesture-based navigation

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USE CASES

• Body mass index: weight / height^2
• Tile cost: area * price_m2 * 1.15
• Fahrenheit → Celsius: (fahrenheit - 32) * 5 / 9
• Simple interest: principal * rate * duration / 100
• Circle area: PI * radius^2
• VAT calculation: price * 1.20