Units - Free Unit Converter

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  • Last update: 6 years ago
  • Version: 2.4.1
  • Size: 5.5 MB
  • Compatibility: Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.
  • Author: Homegrown Software Ltd
  • Content rating: Rated 4+
  • Languages: English
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Units - Free Unit Converter Review

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Units - Free Unit Converter Review

Units is a really useful app that lets you easily convert from various units into lots of others.

NEW: Units now supports doing quick conversions on Apple Watch. Perfect for currency conversions on holiday, or any other calculations you need to do quickly throughout your day.

Units can convert hundreds of units from 43 different categories including Speed, Time, Length, Volume, Area, Power, Temperature, Fuel Consumption, Shoe Sizes and loads more!

Units is now a fully universal app with native support for iPhones, iPod touches and iPads.

As an added bonus, Units also has a built in ruler, for doing small, quick measurements when the need arrises.

• Convert hundreds of units - Units has over 800 units across 43 different categories.
• Convert currency - Units can convert between 88 different currencies, with rates updated daily.
• Hide unused units - Units lets you hide units you don't use, allowing you to maintain a streamline conversion workflow.
• Built in ruler - Units has a built in ruler allowing you to make small, quick measurements without carrying round a ruler.

Also available: Units Premium disables adverts and allows you to reorder both units and unit categories to suit your needs.


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Rating Distribution

(38 327)


  • H
    I have been using the iPhone since the first model was released, and this app is one of the first I installed when the App Store opened to third party developers. I've consistently used it since then, and over the years it's become the only app I use for any conversions. Currency is great for travel and online shopping, and all the other conversions will come in handy at the most unexpected times. It's also useful to have the ruler for getting a rough idea of size. (I'm not good at visualizing 3", for example.) This app had some technical issues a while back, but they seem to be resolved. Despite this app not having an update since 2015, it still works great on my 6S+ running the most current OS. I hope the developer hasn't abandoned the app, because I've never found one that's so simple, comprehensive and affordable. I'm keeping my fingers crossed that they'll come back if needed. Until the app is definitely abandoned and no longer working, I highly recommend this app. It's been on the main screen of every single iPhone I've owned
  • l
    This is one fantastic app. It can convert almost any measurement that one can think of (I.e. Do you know how many cubic inches your new 3.0 liter car engine is?) This app will figure it out for you long before you can begin to find the formula. Best of all, it's totally FREE! Since I first wrote the above review, I still find this to be one of if not the best and most useful apps ever offered. IT'S TOTALLY FREE & it really works on most any conversion that most can think of. If you paid for another "Conversion App" then you OVERPAID! I haven't found any app that works as well or is as easy to use as this one. Do yourself a huge favor and download it right away. You will find yourself using it often. To the writers of this app I wish to say, "Many thanks for a most useful, accurate, and free app!"
  • S
    Everyone who really likes the app and left one star because of technical issues that they more than likely were unaware of, are a bunch of crybabies! And the other crybabies whining about the ruler, come on now give me a break, get a ruler this is a converter app! The only person that has a valid complaint is of the climber and I hope they fix the issue for you other than that this is a pretty good app. I have been using it for years and it hasn't disappointed me yet. To be honest the ruler is kind of stupid. but maybe that's because I have measuring tapes in at least three of the rooms in my house

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