UnitBox — Unit Converter

UnitBox is a fast, no-nonsense unit and currency converter that works entirely offline.

Pick a category, type a value, and see every conversion at once. No loading spinners, no ads, no clutter.

CATEGORIES
• Length, area, volume, mass, and temperature
• Speed, time, digital storage, and data rate
• Energy and pressure
• Currency (using rates you set, stored on your device)

FEATURES
• See all related units convert at the same time
• Star the conversions you use most for one-tap access
• Automatic history of your recent conversions
• Precise conversion factors, including correct temperature offsets
• Adjustable precision for the result

PRIVACY & SIZE
• Fully offline — nothing is uploaded, ever
• No account, no login, no analytics
• No runtime permissions
• Small install, instant launch
• Material 3 design with light and dark themes

Perfect for cooking, DIY, travel, study, engineering, or shipping — anywhere you need a quick, trustworthy answer.