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Screenshots

  • Unit Converter - Henkankun screenshot 1
  • Unit Converter - Henkankun screenshot 2
  • Unit Converter - Henkankun screenshot 3
  • Unit Converter - Henkankun screenshot 4

About Unit Converter - Henkankun

Henkankun - Your Ultimate Unit Converter "How many kilometers is 1 mile?" "What's 98°F in Celsius?" Get instant, accurate answers with this powerful unit conversion app. KEY FEATURES 18 Categories, 100+ Units • Length (m, km, in, ft, mi...) • Mass (g, kg, lb, oz...) • Temperature (°C, °F, K) • Area, Volume, Speed, Time • Pressure, Energy, Power • Concentration, Fuel Economy, Angle, Frequency • Flow Rate, Torque, Rotation • Currency (USD, EUR, JPY + 14 more) Real-Time Conversion See multiple conversion results instantly as you type. Compare units at a glance. One-Tap Swap Quickly switch between source and target units. Reverse calculations in a flash. Favorites & History Save frequently used conversions. Access your conversion history anytime. High-Precision Engine Powered by Decimal-based calculations for accurate, error-free results. PERFECT FOR • Cooking: cups & oz → mL & g • Travel: miles → km, °F → °C • DIY & Crafts: inches → cm • Work: PSI → Pa, gallons → L •Study & Research: Quick unit system conversions DESIGNED FOR SIMPLICITY • Clean, intuitive interface • Dark mode support • English & Japanese languages • Customizable decimal places & rounding • Non-intrusive ads for a smooth experience FULLY OFFLINE No internet required. Use it anywhere, anytime — even while traveling abroad with no data worries! From daily life to professional work, Henkankun handles all your unit conversion needs.

What’s new

Version 1.5.0 · Updated July 7, 2026

We have implemented the “Data Capacity and Data Transfer Speed” category, “Shakkanho Units,” and “Calculation Formula Input.”

App privacy

The developer, Takumi Kinjo, reported these privacy practices to Apple.

Data Not Linked to You

The following data, which may be collected but is not linked to your identity, may be used for the following purposes:

  • Identifiers: Device ID

Used for: Third-Party Advertising

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