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Best Unit Converter Metric Apps

194+ iOS apps curated and reviewed

4.5 avg rating
18 free apps
Updated May 2026

If you already know Convert Any Unit Lite, this is the deeper bench. 194+ unit converter metric apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of May 2026.

Top Picks for Unit Converter Metric

Convert Any Unit Lite#1

Convert Any Unit Lite by Cider Software LLC

Units & Currency Converter
Editor's Choice
✈️ 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

  • πŸ‘ Easy to use
  • πŸš€ Comprehensive unit conversions
  • πŸ’‘ Allows custom unit creation
  • πŸ”§ Useful for cooking, travel, and work

Room to Improve

  • πŸ” Too many unit options can be overwhelming
  • πŸ” Ads can be intrusive and disrupt usage
  • πŸ› Occasional bugs and freezing issues
Metric Conversion tool#2

Metric Conversion tool by Wight Hat

Unit and currency converter
Strong Contender
πŸ” Reference
4.8😐(15K ratings)
Free
Metric Conversion tool screenshot 1
Metric Conversion tool screenshot 2
Metric Conversion tool screenshot 3
Metric Conversion tool screenshot 4
Metric Conversion tool screenshot 5

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.

What We Love

  • πŸ’‘ Useful conversion tool
  • πŸ‘ Easy to use and navigate
  • πŸš€ Quick and efficient
  • πŸ‘ Comprehensive coverage of conversions

Room to Improve

  • πŸ”Š Intrusive and loud ads
  • πŸ”’ Questionable privacy practices
  • πŸ› Inaccurate conversions
Conversion Calculator !#3

Conversion Calculator ! by oWorld Software

Currency, Temperature, Length
Worth Considering
πŸ“Š Productivity
4.6😐(13K ratings)
FreeAdsIn-App Purchases
Conversion Calculator ! screenshot 1
Conversion Calculator ! screenshot 2
Conversion Calculator ! screenshot 3
Conversion Calculator ! screenshot 4
Conversion Calculator ! screenshot 5
Conversion Calculator ! screenshot 6

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

What We Love

  • πŸš€ Easy to use
  • πŸš€ Comprehensive unit conversions
  • πŸ‘ Helpful app
  • πŸ‘ Practical for engineering and mechanics

Room to Improve

  • πŸ” Too many ads
  • πŸ” Ads make the app unusable
  • πŸ” Ads are invasive and disrupt user experience

More Unit Converter Metric apps to explore

4
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.

πŸ”§ Utilities
(1.9K)
5
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!

πŸ”§ Utilities
(1.3K)
6
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!"

πŸ”§ Utilities
(1.6K)
7
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.

πŸ”§ Utilities
(642)
8
CONVERT UNITS
CONVERT UNITS
CONVERT UNITS
Simple unit conversion tool
Free

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.

πŸ“Š Productivity
(932)
9
Convert Any Unit
Convert Any Unit
Convert Any Unit
Units & Currency Converter
$9.99

Convert Any Unit is an innovative app that allows users to effortlessly convert various units of measurement. From length and weight to temperature and more, this app offers a user-friendly interface for quick and accurate conversions. Try it now for seamless unit conversions on the go!

✈️ Travel
(5.1K)
10
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)
11
Metric Unit Converter
Metric Unit Converter
Metric Unit Converter
by A1Brains Infotech
Free

This application is a simple and handy converter that allows users to convert various metric units, including length, weight, temperature, and more, making it a useful tool for daily life and work. Download it for free to easily convert units and solve problems in fields such as finance, real estate, engineering, and education.

πŸ”§ Utilities
(3)
12
Converter: US-Metric Units
Converter: US-Metric Units
Converter: US-Metric Units
Lb-Kg, Cm-Inch, Mi-Km and more
Free

This conversion tool allows users to easily switch between US and metric units for weights, lengths, volumes, and temperature, with a simple interface that requires no instructions. With automatic conversion history saving, users can review past conversions and perform new ones with just a few clicks.

πŸ”§ Utilities
(4)
13
Unit converter - Convert Unit
Unit converter - Convert Unit
Unit converter - Convert Unit
Convert Metric
Free

This unit converter app allows users to quickly and easily convert units with a simple and intuitive interface, and also save their conversions for future reference. Download and start converting units now with this smart and elegant tool.

πŸ”§ Utilities
(14)
14
Measurement unit converter +
Measurement unit converter +
Measurement unit converter +
metric to us, hhaexchange
Free
πŸ“Š Productivity
(0)
15
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!

πŸ” Reference
(16K)
16
gUnit Lite - Free Currency & Unit Converter (Conversion)
gUnit Lite - Free Currency & Unit Converter (Conversion)
gUnit Lite - Free Currency & Unit Converter (Conversion)
by Axonic Labs LLC
Free

gUnit Lite is a convenient currency converter app that allows users to quickly convert between different currencies with ease. Download now to simplify your currency exchange needs on-the-go!

πŸ”§ Utilities
(70)
17
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.

πŸ“Š Productivity
(2.3K)
18
Unit Converter, 50+ Calculator
Unit Converter, 50+ Calculator
Unit Converter, 50+ Calculator
All in one Unit Calculator
Free

This all-in-one unit converter and calculator app offers over 45 converters and calculators for various units, including length, weight, temperature, currency, and more, making it a comprehensive tool for all your conversion needs. Download the app to easily convert units and perform calculations in a single, user-friendly interface.

πŸ”§ Utilities
(53)
19
gUnit - Currency & Unit Converter (Conversion)
gUnit - Currency & Unit Converter (Conversion)
gUnit - Currency & Unit Converter (Conversion)
by Axonic Labs LLC
$1.99

gUnit - Currency is a user-friendly mobile app that provides real-time currency conversion rates, historical data, and customizable alerts. Stay informed about exchange rates and make smart decisions with gUnit - Currency today!

πŸ”§ Utilities
(142)
20
Unit Converter | Converter4U
Unit Converter | Converter4U
Unit Converter | Converter4U
Student Traveler Cook and DIY
Free
$0.99 | 100% OFF

This powerful and intuitive unit conversion app allows users to seamlessly convert between various units of measurement, including length, weight, temperature, and more, providing instant and accurate results. Download the app now and experience the convenience of having a comprehensive conversion tool at your fingertips, saving you time and effort.

πŸ“Š Productivity
(193)

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