Comparison

Units vs Unity

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Units

Easily convert between hundreds of units across 43 categories, including currency with daily updated rates. Customize your workflow by hiding or reordering units and categories.

Highlights
  • Hundreds of units across 43 categories
  • Daily updated currency exchange rates
  • Hide unused units
  • Reorder units and categories
  • Universal app support (iPhone, iPod touch, iPad)
Features
Read full description

Units is the fast, friendly unit converter. Type a number into any unit and instantly see it in every other one, all on a single screen. There's no picking what to convert from and to, no digging through menus, and no ads. With more than 800 units across 43 categories, Units covers everyday conversions like length, weight, volume and temperature, and the ones you need less often, from torque and fuel consumption to data rates, shoe sizes and musical notes. SEE EVERYTHING AT ONCE • Enter a value in any unit and every other unit in the category updates as you type • A keypad made for numbers, so the decimal point is always right where you need it CURRENCY • Convert between more than 160 currencies • Exchange rates updated every day MAKE IT YOURS • Hide the units you never use, so the ones you need are always in view • Reorder units and categories so your favorites come first • Switch on a two-column layout to see even more at a glance • Leave a tip to unlock a collection of alternative app icons MADE FOR YOUR DEVICES • Designed for iPhone and iPad, with your categories and conversion side by side on larger screens • Makes full use of iPhone Duo, whether it's open or closed • Handoff picks up a conversion where you left off on another device • Supports Dark Mode and Dynamic Type Units has been converting since 2008, and is lovingly made in Scotland.

About

Unity

This app offers precise and powerful unit and currency conversion with over 600 conversion types. Save frequent conversions as favorites and access them easily from the home screen. It provides real-time currency rates and historical graphs, with customizable decimal points and calculator functionality.

Highlights
  • Over 600 conversion types
  • Favorites for quick access
  • Real-time currency rates
  • Currency graphs
  • Customizable decimal points
  • Built-in calculator
Read full description

The best unit converter is now even better! Precise, powerful & customisable. Unity is a unit converter that is like no other - because it's built with simplicity in mind. Unity is also powerful - with over 500 conversion types to choose from already, and more arriving with every update. Unity can reliably convert units in 18 categories including Angles, Area, Capacitance, Clothing, Currency/Crypto, Data, Data Rates, Distance, Energy, Mileage, Power, Pressure, Speed, Temperature, Time, Typography, Volume and Weight. You can also save your regular conversions as favourites by tapping the icon on the conversion view and then see them right on the home screen for easy access. Well, there's more important things to do with your day than search for pennyweights and millifarads. Currency rates are updated from our reliable servers. Rates are downloaded on startup and can be refreshed at any time from the conversion view. Up to date currency graphs show how rates have changed over the past day, week, month, or year. Using your location, Unity also creates a suggested conversions to your home currency right from the home screen. Or build your own conversions for countries you're visiting on your next trip! You can set the number of decimal points you would like conversions to be calculated too, work in negative numbers and use the built in calculator for more complex conversions for the highest precision. As well as the huge range of units already built in, we are happy to add any unit to the app to keep our loyal users happy - just get in touch!

Screenshots

Units4 screens
Unity4 screens

Verdict

The call

The clearest difference is ads: Unity at none against Units's shown. Unity also leads on device support (5 vs 2). Units's advantage is review sentiment (60% vs 44%). On price, rating, ratings volume and update cadence there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Units sells 3 one-off in-app purchases and Unity sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.1 for Units against 4.2 for Unity. Both are backed by a comparable volume of ratings — 51 and 25 respectively. Written reviews are what separate them: 60% of Units's written reviews are positive against 44% of Unity's.

UpkeepUpdate frequency

Units ships an update monthly, Unity every 2 months. The most recent releases landed on November 6, 2026 and November 1, 2026 respectively.

Scorecard3 real differences · 7 level
Units versus Unity: the parameters behind the verdict, then further details
ParameterUnitsUnity
PriceFreeFree
Rating4.1 (51 ratings)4.2 (25 ratings) — better
Positive reviews60.1% of reviews — better44.1% of reviews
Number of ratings51 — better25
Update frequencyMonthly — betterEvery 2 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod, Mac, Apple Watch — better
Requires iOS17.0 — better18.0
Further details — not scored
Size86 MB14 MB
Age rating4+4+
DeveloperHomegrown Software LtdPeachy Ventures Ltd.

Customer experience

Units

All ratings49 ratings
Positive79.6%
Neutral4.1%
Negative16.3%
Written reviews581 reviews
Positive60.1%
Neutral12.0%
Negative27.9%

Unity

All ratings25 ratings
Positive80.0%
Neutral4.0%
Negative16.0%
Written reviews59 reviews
Positive44.1%
Neutral3.4%
Negative52.5%

Bugs and requests

Units

Reported bugs

4 issues
  • Crashes when clearing input fields
  • Numerical keypad covers conversion results
  • Incompatibility issues with newer iOS versions
  • Ruler measurements not accurate on all devices

Requested features

5 requests
  • Add nautical units (miles, knots)
  • Improve currency conversion accuracy and updates
  • Allow customization of visible unit categories
  • Add more clothing/shoe size conversions
  • Improve user interface and search functionality

Unity

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Units

One-time3
  • Small Tip$0.99
  • Medium Tip$2.99
  • Large Tip$4.99
1 purchases

Unity

One-time1
  • Get Full Features$2.99

Questions

Is Units free?
Units is free to download, with in-app purchases available.
Is Unity free?
Unity is free to download, with in-app purchases available.
Which has better reviews, Units or Unity?
Unity is rated higher. Units averages 4.1 out of 5 from 51 ratings, while Unity averages 4.2 from 25 ratings.
Do Units or Unity have ads?
Units shows ads; Unity does not.
Which is updated more often, Units or Unity?
Units ships an update monthly, and Unity every 2 months. Most recently, Units was updated on November 6, 2026 and Unity on November 1, 2026.

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