Converter of Units

Measurements, dates and tank

Free · Designed for iPad

Updated for iOS and iPadOS 26, new iPhone 17 (all models) and iPad. Search measurements and units, currency flags, sidebar, windowed apps and Stage Manager in iPadOS. The unit converter feature from our popular aio Calculator is now available as a standalone app. Always free and without ads. It's an easy-to-use, modern converter with a unique combination of features, including: • Designed for iPhone and iPad • Sidebar and tab bar for easier navigation and sharing of data • Multiple windows • Windowed apps and Stage Manager in iPadOS • Drag a sidebar entry to the edge of the screen to open it in a new window • Context menus • Quick Start Guide • System, Light or Dark appearance • Multitasking • Full support for drag and drop • Quick Notes • Capture text • Keyboard shortcuts • Pointer interaction • Mark favorites and edit the lists to show only what you use • Favorites sync across your devices, and with aio Calculator, through iCloud • Slider and menu for precision control • Search measurements by name or by their units • Currency flags • Undo and redo • Home Screen quick actions from the app icon • Spotlight Search • Accessibility features like VoiceOver and Dynamic Type (larger text) • Share results, including using AirDrop • Takes advantage of the larger display on iPad • Settings to customize the app • Conversions saved and restored for all measurements Has close to 500 units in the following 38 measurements: • Acceleration • Angle • Area • Computer Data Rate • Computer Data Storage • Concentration - Glucose • Currency • Density • Electric Vehicle Efficiency • Electrical Charge • Electrical Current • Electrical Inductance • Electrical Resistance • Electrical Voltage • Energy • Flow Rate - Dry • Flow Rate - Liquid • Force • Frequency • Fuel Economy • Illumination • Lady's Shoe Size • Length • Luminance • Magnetic Field Strength • Magnetic Flux • Magnetic Flux Density • Magnetomotive Force • Mass / Weight • Men's Shoe Size • Power • Pressure and Stress • Speed / Velocity • Temperature • Time • Torque • Volume - Dry Capacity • Volume - Liquid Capacity Date calculators • Calculate the difference between two dates • Add to or subtract from a given date Tank Capacity • Horizontal Cylinder • Vertical Cylinder • Rectangular • Horizontal Oval • Vertical Oval • Horizontal Capsule • Vertical Capsule • Sphere Mixture Calculator • Calculate the needed volume for a mixture at a given ratio Info feature • Detailed description of the app available in all features • Table of contents and search allow you to find topics of interest Email us to request more measurements or units. Future updates will continue to add more features. Enjoy our app that, as always, is free and without ads!

  • 4.7
    out of 5
    48 Ratings

Thank you for using our app. It's regularly improved and modernized to better serve you. Recent changes include: • Favorites sync through iCloud again, across your iPhone and iPad and with the aio Calculator app; turn it off in Settings > Apps > Converter > Converter Favorites • Search measurements by name or by the units they contain; opening one shows the matching units • Search the units of the measurement on screen • Each currency shows its country's flag • Speed / Velocity adds Inch/Minute (in/min) and Millimeter/Minute (mm/min) • Choose System, Light or Dark appearance from the Settings menu • Touch and hold the precision button to pick a precision directly • Refreshed, translucent Liquid Glass toolbars; toolbar buttons grow with the system text size • Improved VoiceOver: unit names are read once, and every button has a name • The Feet Inch unit shows its value again, such as 8 ft 2.4 in • Touching and holding a measurement shows its menu again • Clear in Tank Capacity and Dates is available whenever there is something to clear • Fixed a crash on iPad when choosing Rate or Write Review or See in App Store • The converter no longer flickers when the device is rotated • The Information guide follows Light and Dark appearance and fits the screen in either orientation • iPad: the sidebar floats beside the converter, and touching and holding a measurement in it shows its full menu again • Dates, Tank Capacity and Mixture show their toolbar in two groups, like the converter • The app's page in the Settings app shows all of its settings again on iOS 26 • Corrected unit and measurement names, such as Foot/Second Squared and Pound/Cubic Foot • General fixes and improvements

The developer, Ramon Rivas, 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.

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

    The developer indicated that this app supports the following accessibility features. Learn More

    • Supported Features

      • VoiceOver

      • Voice Control

      • Larger Text

      • Dark Interface

      • Reduced Motion

    Seller
    Ramon Rivas
    Size
    5.4 MB
    Category
    Productivity
    Compatibility
    Requires iOS 18.0 or later.
    • iPhone
      Requires iOS 18.0 or later.
    • iPad
      Requires iPadOS 18.0 or later.
    • Mac
      Requires macOS 15.7 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 2.0 or later.
    Languages
    English and Spanish
    Age Rating
    4+
    Copyright
    © 2026 Ramon Rivas