Unit Converter & Dictionary

Convert units & look them up

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

An app that both converts units and works as a dictionary explaining what each unit means. Useful for everything from converting units in class to checking currency before a trip abroad. ■ A wide range of conversion categories • Length, area, volume, mass, speed, temperature, angle, pressure, energy, power, force, density, fuel economy, data size, and more • Includes lesser-known units too — traditional Japanese units, imperial units, nautical miles, carats, horsepower ■ Unit dictionary • Search across unit names, aliases, and symbols • Look up how a unit is pronounced, its rough scale, and fun facts • Jump straight from a search result into conversion mode ■ Currency conversion • Real-time currency conversion using up-to-date exchange rates ■ Built to be easy • Conversion and dictionary lookups work entirely on your device (only currency conversion needs a connection, to fetch exchange rates) ■ AI support (Premium) • Ask about units and conversion settings. Supported controls help prepare conversion; results are calculated by the app, not generated by AI. ■ Premium plan • AI help with app usage and supported actions • Up to 30 successful external AI responses per app and subscription each day; resets at midnight Japan Standard Time • AI requires an internet connection and consent to send data • Ads removed Good for: converting recipe measurements, studying science and math, or checking currency and units before an overseas trip. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Ratings & Reviews

  • 5.0
    out of 5
    1 Ratings

Updated the connection used for AI support. You can review the information sent before submitting a question and withdraw consent in Settings. AI support is limited to 30 successful responses per subscription per day, resetting at midnight Japan time.

Version 1.0.3

The developer, Mikoto Gateway, 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 Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Purchases
    • Location
    • Identifiers
    • Usage Data
    • Diagnostics

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • User Content

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
Mikoto Gateway
Size
13.4 MB
Category
Utilities
Compatibility
Requires iOS 15.0 or later.
  • iPhone
    Requires iOS 15.0 or later.
  • iPad
    Requires iPadOS 15.0 or later.
  • iPod touch
    Requires iOS 15.0 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
Japanese
Age Rating
4+
In-App Purchases
Yes
Copyright
© 2026 Mikoto Gateway
  • Developer Website
  • Privacy Policy

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