Convertor Pro

Convertor Pro

10,000 - 50,000 downloads

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All the units you need to convert, wrapped in the best user interface: as easy and intuitive to use as a calculator. It's unit conversion done right!

• Converts as you type (no "Convert" button to press)
• Use mixed units, like feet+inches
• Freely mix fractions (like ½) with decimals (like 0.5)
• Switch units by swipe, long-press, or menu
• Unit calculator with clipboard "memory"
• Supports tablets
• Three UI skin options: Holo Dark, Holo Light, and Classic Gray
• Includes Chinese and Hong Kong units
• Unit categories cover everything from the basics of length, weight and volume to more specialist measurements like magnetic flux density, torque, or radioactive decay. For a full list, please see the Convertor website,
• Currency conversions - converts the major world currencies listed by the Canadian and European Central Banks, complete lists at and - but please note that additional currencies can't just be added at will. The currency rates in the app have to come from somewhere, and if these banks don't list your favored currency, then the app can't show an exchange rate for it.

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Recently changed in this version

• Support single-tap to select category, or unit (on active unit row)
• Remove "Use fractions" checkbox from unit selection dialog
• Fix occasional crash when dis/enabling ads in settings (Free only)
• Fix bug: "Hide action bar" setting visible on some Samsung devices w/o a hardware Menu button
• Discontinue support for Android 1.6 (Donut

Comments and ratings for Convertor Pro
  • (75 stars)

    by Jeremy Clow on 27/05/2014

    This is by far the best conversion app in the Play Store. The fact that I can see up to four different values at once and perform basic arithmetic on those values all on the same's a no-brainer.

  • (75 stars)

    by Steve Burt on 08/05/2014

    Let's you convert anything you can think of to anything else. Got it free from Amazon but bought it again from Google Play just to support the dev.

  • (75 stars)

    by Steve Smith on 23/03/2014

    There are two must-have apps for my mobile device: a password safe; and a unit converter. I'm Australia-based but have worked for a US company for nearly 25 years. I use unit converters a lot and have tried more than a dozen of them. I keep coming back to Converter Pro from Udell. It suits my needs perfectly. Lots of units to choose from and a good interface and I have never had a bug hit me

  • (75 stars)

    by Mario Donoso on 16/03/2014


  • (75 stars)

    by Mike Paterson on 05/02/2014

    What with superb Support and an exceptional App made awarding this title an easy 5 Stars. Everything about the App shows professionalism. From the layout to options available, no other conversion App comes close. Need to convert kg to St + lb or day's into hrs + mins or a third of a mile (yes Fractions as well) into ft + inches no problem, Convertor handles them with ease.

  • (75 stars)

    by Sharon Townsend on 04/02/2014

  • (75 stars)

    by Thom Beebo on 03/02/2014

    There is no similar app on GP that even comes close to the functionality & info in this app. When Google assigns the term "TOP DEVELOPER", Sterling Udell's apps should be the "standard" by which all others "given" that designation are judged. Purchase his TerraTime, PolyClock, and Moon Phase Pro, like me, & you'll further understand why I state that. I haven't had a significant bug in any of his a