1. Home
  2. Topics
  3. Units Converter

Best Units Converter Apps

203+ iOS apps curated and reviewed

4.6 avg rating
19 free apps
Updated May 2026

With an average user rating of 4.6★, the units converter category is one of the App Store's strongest. Browse all 203+ apps we track, sorted so the most loved ones surface first.

Top Picks for Units Converter

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 UNITS#2

CONVERT UNITS by Yan Liong Tan

Simple unit conversion tool
Strong Contender
📊 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
Units - Pro Unit Converter#3

Units - Pro Unit Converter by Homegrown Software Ltd

Worth Considering
🔧 Utilities
3.6😐(150 ratings)
FreeAdsIn-App Purchases
Units - Pro Unit Converter screenshot 1
Units - Pro Unit Converter screenshot 2
Units - Pro Unit Converter screenshot 3

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.

What We Love

  • 🚀 Efficient and fast conversions
  • 👍 Comprehensive list of units
  • 🔍 Customizable unit selection
  • 💰 Free app with optional paid version

Room to Improve

  • 🐛 Crashes and stability issues
  • 🕰️ Outdated currency conversion rates
  • 🔍 Too many unit categories, hard to navigate

More Units Converter apps to explore

4
Convert Any Unit Lite
Convert Any Unit Lite
Convert Any Unit Lite
Units & Currency Converter
Free

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.

✈️ Travel
(47K)
5
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)
6
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)
7
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)
8
GlobeConvert Currency & Units
GlobeConvert Currency & Units
GlobeConvert Currency & Units
Convert Currency and Units
Free

Convert currencies quickly and easily with this user-friendly app. Access up-to-date exchange rates and make conversions on the go. Experience convenience at your fingertips. Try it now!

🔧 Utilities
(79K)
9
Unit Converter Calculator Pro
Unit Converter Calculator Pro
Unit Converter Calculator Pro
Simple With Metric & Imperial
Free

This application is a user-friendly tool for swiftly converting units across various metrics, making calculations hassle-free. Try it now for effortless unit conversions on-the-go.

🔧 Utilities
(916)
10
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)
11
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)
12
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)
13
Fancy Units Converter
Fancy Units Converter
Fancy Units Converter
Currency and Unit Converter
Free

"Easily convert currencies and units with this user-friendly app for quick and hassle-free calculations. Simplify your conversions now!"

🔧 Utilities
(1.6K)
14
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)
15
Units Converter+
Units Converter+
Units Converter+
by Fusion Software Development Pty Ltd
Free

This free unit-converting tool allows you to easily convert across over 20 categories and 400+ units, from imperial to metric and vice versa, with a simple and fast interface. Download now and start converting quickly with features like automatic currency exchange rate updates and mixed-unit support.

🔧 Utilities
(1)
16
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)
17
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
(1.3K)
18
My Units Converter
My Units Converter
My Units Converter
by MIIN Ltd
Free
📊 Productivity
(1)
19
Conversion Calculator Plus
Conversion Calculator Plus
Conversion Calculator Plus
Unit Converter
Free

"Explore the ultimate Unit Converter tool with Conversion Calculator Plus – your go-to Swiss army knife for effortless unit conversions. Simplify complex calculations and streamline your work effortlessly."

📊 Productivity
(15K)
20
Unit Converter – Best Unit App
Unit Converter – Best Unit App
Unit Converter – Best Unit App
Convert All Units and Currency
Free

This unit converter app is a fast, free, and simple tool that lets you convert various units and currencies effortlessly. Featuring a beautiful design, it offers live currency updates and allows you to quickly swap units with just a press of a button, making conversions easy and efficient.

🔧 Utilities
(55)

Looking for something similar to units converter?

Explore related topics

unit converter bakery
unit converter metric
unit converter inches
unit converter weight
unit converter kitchen
unit converter power
unit converter energy
unit converter pressure
unit converter offline

Related searches

fancy units convertermetric to imperial units converterconvert: units converterunits converter easyunits converter+units converter for engineersunits converters.units converter totalunits converter pro