Comparison

Units vs Conversion Calculator Units

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

Conversion Calculator Units

This app offers a simple and powerful way to convert between over 140 units across 12 categories. Easily switch between units, customize your experience with themes, and share your results.

Highlights
  • Converts over 140 units
  • Supports 12 conversion categories
  • Customizable themes
  • Drag and set unit positions
  • Add units to favorites
  • Share converted units via email
Features
Read full description

* Handy Conversion Calculator App For 12 Categories & 140+ Units * Simple, Powerful & Conversion Calculator app designed for iPhone and iPad! Just tap and convert any units with its clean interface and user-friendly navigation. Simple swipe actions will allow you to convert quickly and change conversion options easily for additional convenience. Download the fastest & easiest to use converter app today! Conversions from one unit to another unit no longer have to be confusing, simply use Best Unit Converter today. * Features: - Ability To Change Themes - Drag & Set Position Of Units - Add Units To Favorites Section - Restore Category Listing - Enable/Disable Units - Set Decimal Digit Count - Share Converted Units by Email ** Conversion (12 Categories & 140+ Units): - Area  - Length - Energy - Volume - Weight - Power  - Speed  - Time - Number - Temperature  - Data Storage - Fuel Consumption Conversion Calculator is a beautifully designed universal app, designed for both iPhone & iPad. Get the best easy to use metric and units converter for length, number, power, speed, temperature, time, weight, area, energy, and other popular measurement converters tool. Download free. ************************************************************* * Download Conversion Calculator Today! * * Be Sure To Checkout Other Popular Utilities & Games From RV AppStudios! * *************************************************************

Screenshots

Units4 screens
Conversion Calculator Units4 screens

Verdict

The call

The clearest difference is rating: Conversion Calculator Units at 4.7 against Units's 4.1. Conversion Calculator Units also leads on ratings volume (5K vs 51) and review sentiment (82% vs 60%). Units's advantage is update cadence (monthly vs every 2 months). On price, ads, in-app purchases and monetization model 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 Conversion Calculator Units 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

Conversion Calculator Units holds the better App Store score, 4.7 against 4.1. That said, the two scores are not equally well evidenced: Conversion Calculator Units has 5K ratings behind it against 51, so its average is the more settled of the two. Written reviews point the same way: 60% of Units's written reviews are positive against 82% of Conversion Calculator Units's.

UpkeepUpdate frequency

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

Scorecard5 real differences · 5 level
Units versus Conversion Calculator Units: the parameters behind the verdict, then further details
ParameterUnitsConversion Calculator Units
PriceFreeFree
Rating4.1 (51 ratings)4.7 (5K ratings) — better
Positive reviews60.1% of reviews82.1% of reviews — better
Number of ratings515K — better
Update frequencyMonthly — betterEvery 2 months
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size86 MB41 MB
Age rating4+4+
DeveloperHomegrown Software LtdRV AppStudios LLC

Customer experience

Units

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

Conversion Calculator Units

All ratings4,970 ratings
Positive95.7%
Neutral2.5%
Negative1.8%
Written reviews117 reviews
Positive82.1%
Neutral5.1%
Negative12.8%

User reviews

Units

From 51 App Store ratings

What we love

  • 🚀 Efficient and fast conversions
  • 👍 Comprehensive list of units
  • 🔍 Customizable unit selection
  • 💰 Free app with optional paid version
  • 🔧 Useful for engineering and technical work

Room to improve

  • 🐛 Crashes and stability issues
  • 🕰️ Outdated currency conversion rates
  • 🔍 Too many unit categories, hard to navigate
  • 💰 Ads in free version
  • 📏 Ruler feature not accurate on some devices

Conversion Calculator Units

From 5K App Store ratings

What we love

  • 👍 User-friendly
  • 🚀 Easy to use
  • 💡 Helpful for learning metric system
  • 👍 Great for conversions
  • 👍 Intuitive interface

Room to improve

  • 🐛 Ads disrupt usage
  • 🐛 Difficult to change units
  • 🐛 Lacks portrait mode
  • 🐛 Upside-down orientation issues
  • 🐛 Cluttered UI design

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

Conversion Calculator Units

Reported bugs

2 issues
  • Ads not removed after purchase
  • Incorrect unit conversions

Requested features

4 requests
  • Add pressure conversion units
  • Include a basic calculator function
  • Implement multi-language support
  • Allow customization of unit order

In-app purchases

3 purchases

Units

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

Conversion Calculator Units

One-time1
  • Remove Ads$1.99

Questions

Is Units free?
Units is free to download, with in-app purchases available.
Is Conversion Calculator Units free?
Conversion Calculator Units is free to download, with in-app purchases available.
Which has better reviews, Units or Conversion Calculator Units?
Conversion Calculator Units is rated higher. Units averages 4.1 out of 5 from 51 ratings, while Conversion Calculator Units averages 4.7 from 5K ratings.
Do Units or Conversion Calculator Units have ads?
Both Units and Conversion Calculator Units show ads.
Which is updated more often, Units or Conversion Calculator Units?
Units ships an update monthly, and Conversion Calculator Units every 2 months. Most recently, Units was updated on November 1, 2026 and Conversion Calculator Units on November 6, 2026.

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