Caltrix: Smart Calculator
Feed My Mailbox LLC Tools
Fast offline calculator with scientific mode & unit converter. No ads.
- Downloads
- 2+
- on Google Play
- Price
- Free
- No in-app purchases
- Updated
- Sep 14
- 2026 · v1.0.0
Screenshots
About Caltrix: Smart Calculator
Caltrix — Fast, Private, Offline Calculator
Caltrix is a clean, premium calculator built for speed and simplicity. Whether you need a quick everyday calculation or advanced scientific functions, Caltrix handles it instantly — completely offline, with zero ads and zero tracking.
WHY CALTRIX?
- 100% Offline — works with no internet connection, always
- No Ads — a clean, distraction-free experience
- No Account Needed — open the app and start calculating
- Privacy First — your data never leaves your device
KEY FEATURES
Smart Calculator
Perform everyday calculations with a smooth, responsive keypad. Switch to Scientific mode for trigonometric functions, logarithms, powers, roots, and more.
Unit Converter
Convert between units instantly across multiple categories:
- Length (mm, cm, m, km, inches, feet, yards, miles)
- Weight (mg, g, kg, oz, lb, metric tons)
- Temperature (Celsius, Fahrenheit, Kelvin)
- Area (sq meters, sq feet, acres, hectares, and more)
- Volume (ml, liters, cubic meters, gallons, cups, and more)
Calculation History
Every calculation is automatically saved so you can revisit and reuse past results — swipe to delete anything you don't need, or clear your entire history in one tap.
Percentage Tools
Quickly calculate percentages, discounts, and increases without manual formulas.
Personalization
- Light, Dark, or System theme
- Adjustable decimal precision
- Optional haptic feedback on key presses
PRIVACY YOU CAN TRUST
Caltrix does not collect, transmit, or share any personal information. Your calculation history and settings are stored only in your device's private storage — never sent anywhere. No analytics, no trackers, no hidden data collection.
Download Caltrix today for a calculator that's fast, beautiful, and respects your privacy.
Caltrix is a clean, premium calculator built for speed and simplicity. Whether you need a quick everyday calculation or advanced scientific functions, Caltrix handles it instantly — completely offline, with zero ads and zero tracking.
WHY CALTRIX?
- 100% Offline — works with no internet connection, always
- No Ads — a clean, distraction-free experience
- No Account Needed — open the app and start calculating
- Privacy First — your data never leaves your device
KEY FEATURES
Smart Calculator
Perform everyday calculations with a smooth, responsive keypad. Switch to Scientific mode for trigonometric functions, logarithms, powers, roots, and more.
Unit Converter
Convert between units instantly across multiple categories:
- Length (mm, cm, m, km, inches, feet, yards, miles)
- Weight (mg, g, kg, oz, lb, metric tons)
- Temperature (Celsius, Fahrenheit, Kelvin)
- Area (sq meters, sq feet, acres, hectares, and more)
- Volume (ml, liters, cubic meters, gallons, cups, and more)
Calculation History
Every calculation is automatically saved so you can revisit and reuse past results — swipe to delete anything you don't need, or clear your entire history in one tap.
Percentage Tools
Quickly calculate percentages, discounts, and increases without manual formulas.
Personalization
- Light, Dark, or System theme
- Adjustable decimal precision
- Optional haptic feedback on key presses
PRIVACY YOU CAN TRUST
Caltrix does not collect, transmit, or share any personal information. Your calculation history and settings are stored only in your device's private storage — never sent anywhere. No analytics, no trackers, no hidden data collection.
Download Caltrix today for a calculator that's fast, beautiful, and respects your privacy.
User reviews
it's a good any easy to use
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