1. Home
  2. Topics
  3. Units Convertion

Best Units Convertion Apps

191+ iOS apps curated and reviewed

4.6 avg rating
18 free apps
Updated May 2026

If you already know Unit Converter, this is the deeper bench. 191+ units convertion apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of May 2026.

Top Picks for Units Convertion

Unit Converter - Best Unit App#1

Unit Converter - Best Unit App by Alan Mrvica

Convert All Units and Currency
Editor's Choice
✈️ Travel
4.8😊(172K ratings)
FreeAdsIn-App Purchases
Unit Converter - Best Unit App screenshot 1
Unit Converter - Best Unit App screenshot 2
Unit Converter - Best Unit App screenshot 3
Unit Converter - Best Unit App screenshot 4
Unit Converter - Best Unit App screenshot 5
Unit Converter - Best Unit App screenshot 6

A free unit converter app optimized for iPhone and iPad, featuring 12 categories for converting various units including area, currency, data, length, and more. Includes daily currency updates for 155 world currencies and is designed for easy use. Download now for quick and accurate unit conversions.

What We Love

  • 🚀 Easy to use
  • 👍 Comprehensive conversions
  • 💡 Useful for travel and cooking
  • 🚀 Quick and efficient

Room to Improve

  • 🐛 Limited character input
  • 🐛 Difficulty with negative numbers
  • 💡 Lack of ability to quickly switch between conversions
Convert Any Unit Lite#2

Convert Any Unit Lite by Cider Software LLC

Units & Currency Converter
Strong Contender
✈️ Travel
4.7😊(47K ratings)
FreeAds
Convert Any Unit Lite screenshot 1
Convert Any Unit Lite screenshot 2
Convert Any Unit Lite screenshot 3
Convert Any Unit Lite screenshot 4
Convert Any Unit Lite screenshot 5

Convert Any Unit Lite is a versatile app that simplifies unit conversions for users, offering a wide range of conversion options. Easily switch between various units for length, weight, volume, and more with a user-friendly interface. Download now to streamline your conversion needs.

What We Love

  • 👍 Easy to use
  • 🚀 Comprehensive unit conversions
  • 💡 Allows custom unit creation
  • 🔧 Useful for cooking, travel, and work

Room to Improve

  • 🔍 Too many unit options can be overwhelming
  • 🔍 Ads can be intrusive and disrupt usage
  • 🐛 Occasional bugs and freezing issues
CONVERT UNITS#3

CONVERT UNITS by Yan Liong Tan

Simple unit conversion tool
Worth Considering
📊 Productivity
4.8😊(932 ratings)
FreeAds
CONVERT UNITS screenshot 1
CONVERT UNITS screenshot 2
CONVERT UNITS screenshot 3

Convert Units is a comprehensive conversion tool that supports various unit types, including currency, with automatic currency updates and a vast selection of 160 currencies. It offers convenient features like multitasking on iPad, quick access links, and customizable display options for accuracy and rounding. The app provides a user-friendly interface with a dark design and the ability to disable sound and rotation.

What We Love

  • 👍 Quick & easy to use
  • 👍 Ease of use
  • 👍 Simple and easy to use
  • 👍 Well thought out and easy to use

Room to Improve

  • 🐛 Ads obstruct use
  • 🐛 Subscription required to remove ads
  • 🐛 Currency conversion not working

More Units Convertion apps to explore

4
Unit Converter - Pro Units App
Unit Converter - Pro Units App
Unit Converter - Pro Units App
Convert Any Unit
Free

A versatile conversion calculator app that effortlessly converts various units like length, weight, volume, and more. Simplify your conversions with ease by downloading the app now!

🔍 Reference
(16K)
5
Conversion Calculator !
Conversion Calculator !
Conversion Calculator !
Currency, Temperature, Length
Free

Easily convert units of measurement with this user-friendly app. Say goodbye to complex calculations and simplify your unit conversions today!

📊 Productivity
(13K)
6
Metric Conversion tool
Metric Conversion tool
Metric Conversion tool
Unit and currency converter
Free

A must-have unit conversion app with over 30,000 conversions, 160 currencies, and detailed historical records. Easily convert weights, temperatures, lengths, areas, volumes, time, angles, and more. Access nine significant digits and fractional results.

🔍 Reference
(15K)
7
Conversion Calculator Units
Conversion Calculator Units
Conversion Calculator Units
Unit Conversion Calculator All
Free

This app is a handy conversion calculator with 12 categories for quickly converting units. Simplify your conversions with ease!

🔧 Utilities
(4.8K)
8
Units - Pro Unit Converter
Units - Pro Unit Converter
Units - Pro Unit Converter
by Homegrown Software Ltd
Free

This free app is a versatile unit converter with the ability to convert hundreds of units across various categories, including currency. Users can customize their conversion workflow by hiding unused units and reordering categories. The app is available on iPhones, iPod touches, and iPads.

🔧 Utilities
(150)
9
All Unit Conversion
All Unit Conversion
All Unit Conversion
Unit converter
Free

This simple and useful free unit converter allows users to easily convert between various units of measurement across multiple categories, including length, area, volume, mass, time, digital storage, energy, and currency. Download now and start converting units with ease!

🔧 Utilities
(17)
10
Unit Conversion - Converter and Calculator
Unit Conversion - Converter and Calculator
Unit Conversion - Converter and Calculator
by FAPPS WORLD et Cie SCS
$0.99
🔧 Utilities
(98)
11
Unit Converter: Mila's Tools
Unit Converter: Mila's Tools
Unit Converter: Mila's Tools
Metric Conversion Calculator +
Free

Experience quick and easy unit conversions with a free, fast, and elegant calculator tool from Mila's Tools. Convert various units such as Area, Bits, Bytes, Length, Temperature, and more effortlessly. Try it out now for hassle-free conversions!

🔧 Utilities
(1.4K)
12
Converter (unit conversions)
Converter (unit conversions)
Converter (unit conversions)
by Brent Royal-Gordon
Free

An essential unit conversion tool praised by Macworld Magazine, featuring 76 measurement units across various categories. Easily convert between units like length, weight, temperature, and more with a user-friendly interface and daily exchange rate subscription option for 161 currencies. Effortlessly manage your everyday unit conversions with this intuitive and practical application.

🔧 Utilities
(1.9K)
13
Unit Converter HD.
Unit Converter HD.
Unit Converter HD.
30 categories, 700+ units
Free

Discover a powerful unit converter app with 30 categories and over 700 units of measure. Make conversions easily across various categories and save time with this user-friendly tool.

🔧 Utilities
(642)
14
Units Plus Converter
Units Plus Converter
Units Plus Converter
Convert Any Unit & Currency
$19.99

Units Plus Converter is a versatile application capable of converting any unit of measurement into another. From length and weight to temperature and currency, this app provides a comprehensive tool for all your conversion needs. Download now for hassle-free unit conversions.

🔧 Utilities
(8.3K)
15
Ad-Free Unit Converter
Ad-Free Unit Converter
Ad-Free Unit Converter
by William Jockusch
Free

This free unit converter app is ad-free, ensuring a seamless user experience. With support for a variety of units, it offers simple and intuitive conversion on a single screen. Give it a try for hassle-free unit conversions!

🔧 Utilities
(54)
16
Unit of measurement converter
Unit of measurement converter
Unit of measurement converter
Conversion units Calculator
Free

This unit conversion calculator simplifies comparing and converting different units across 15 categories and 95 measuring units. Say goodbye to unit conversion headaches and save time instantly by just inputting numbers and changing units. Try it now!

🔧 Utilities
(372)
17
CalConvert: Currency Converter
CalConvert: Currency Converter
CalConvert: Currency Converter
Calculator & Unit Conversion $
Free

Convert currencies easily and efficiently with this intuitive currency converter app. Simply input the amount and select the currencies you want to convert between, making international transactions a breeze. Download now to streamline your currency conversions.

✈️ Travel
(6.4K)
18
Conversions - Unit Converter
Conversions - Unit Converter
Conversions - Unit Converter
Simple unit conversions
Free

This application is a comprehensive unit converter that allows users to easily convert between a wide range of units, including temperature, length, weight, and more. It features a native iOS design, detailed unit information, and the ability to copy or share conversions, all within a private and secure, ad-free experience. The app provides a valuable tool for anyone who needs to quickly and accurately convert between different units of measurement.

🔧 Utilities
(2)
19
Unity: The Best Unit Converter
Unity: The Best Unit Converter
Unity: The Best Unit Converter
Unit & Currency Conversion.
Free

This unit and currency converter offers precise and customizable conversions across over 600 types, including 18 categories, with features like favourites, up-to-date currency rates, and a built-in calculator. Download it now to easily convert units and currencies, and even create your own custom conversions!

🔧 Utilities
(25)
20
Converter+ (Units, Currencies)
Converter+ (Units, Currencies)
Converter+ (Units, Currencies)
Unit and Currency Converter
Free

Unit and Currency Converter: Access a comprehensive unit conversion tool featuring a wide range of currencies and units across various categories. Perform calculations with calculators for everyday needs, edit templates, and download user-contributed templates. Keep up-to-date with automatic currency exchange rate updates every 6 hours.

📊 Productivity
(2.3K)

Looking for something similar to units convertion?

Explore related topics

Related searches

units - conversion calculatorunits conversion chartdiy units conversion