UnitBox Unit Converter
Every unit. Nothing locked.
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Every unit unlocked from the first launch — no paywall on Force or Pressure, no ads mid-conversion, no account required. Just fast, offline conversions.
UnitBox converts everything length, weight, temperature, volume, area, speed, force, pressure, and energy completely offline, with every unit unlocked from the first launch.
No currency conversion, no accounts, no ads, nothing to buy. Just a fast, accurate converter that works the way a converter should.
WHY UNITBOX
Most unit converters get expensive right when you actually need them: scientific units like Newtons get locked behind a paywall, video ads interrupt you mid-number-entry, or a permanent unlock costs more than dinner. UnitBox has none of that. Every category including Force, Pressure, and Energy is unlocked the moment you install it.
NINE CATEGORIES, EVERY UNIT
• Length meters, feet, miles, kilometers, and more
• Weight kilograms, pounds, ounces, grams, stone, metric tons
• Temperature Celsius, Fahrenheit, Kelvin
• Volume liters, milliliters, gallons, fluid ounces, cups
• Area square meters, square feet, acres, hectares
• Speed km/h, mph, m/s, knots
• Force Newtons, pound-force
• Pressure Pascals, bar, PSI, atmospheres
• Energy Joules, calories, kilowatt-hours
BUILT FOR SPEED
Type a number, tap a unit, get your answer instantly no network required, no loading spinner, no waiting on a video before you can see your conversion. UnitBox works exactly the same on a plane, underground, or with your phone in airplane mode.
PRIVATE BY DESIGN
UnitBox doesn't ask for an account, doesn't send your data anywhere, and doesn't need permissions it can't justify. There's nothing to sign up for and nothing to track.
Everything unlocked. Nothing to buy. Just a converter.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Feda Hadziselimovic, 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
- Feda Hadziselimovic
- Size
- 403.5 KB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 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.
- iPhone
- Languages
- English and German
- Age Rating
4+
- 4+
- Copyright
- © 2026 Fedja Hadziselimovic