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Best Metric Conversion Unit Apps

239+ iOS apps curated and reviewed

4.2 avg rating
19 free apps
Updated August 2026

Whether you're new to metric conversion unit or looking for an upgrade, our curated collection of 239+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Compare top Metric Conversion Unit Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Metric Conversion toolMetric Conversion toolFree4.8★ (15K)NoNoAug 2026
2Convert Any Unit LiteConvert Any Unit LiteFree4.7★ (48K)YesNoAug 2026
3Unit Converter 2021Unit Converter 2021Free4.7★ (408)YesYesAug 2026
4Imperial - Metric ConversionsImperial - Metric ConversionsFree—NoNoMay 2026
5Uniter: Smart Unit ConversionUniter: Smart Unit ConversionFree4.7★ (69)NoYesAug 2026
6Unit Converter - Best Unit AppUnit Converter - Best Unit AppFree4.8★ (191K)YesYesAug 2026
7Unit Converter - Convert allUnit Converter - Convert allFree4.6★ (13K)YesYesAug 2026
8Conversion Calculator - MetricConversion Calculator - MetricFree4.8★ (157)NoYesAug 2026

Top Picks for Metric Conversion Unit

Metric Conversion tool#1

Metric Conversion tool by Wight Hat

Unit and currency converter
Editor's Choice
🔍 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

This app provides a comprehensive unit and currency converter with a user-friendly interface. It offers offline functionality, supports over 30,000 unit conversions, and includes more than 160 currencies with live exchange rates. Users can save favorite conversions and get precise results.

What We Love

  • 💡 Useful conversion tool
  • 👍 Easy to use and navigate
  • 🚀 Quick and efficient
  • 👍 Comprehensive coverage of conversions

Room to Improve

  • 🔊 Intrusive and loud ads
  • 🔒 Questionable privacy practices
  • 🐛 Inaccurate conversions
Convert Any Unit Lite#2

Convert Any Unit Lite by Cider Software LLC

Units & Currency Converter
Strong Contender
✈️ Travel
4.7😊(48K 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

Quickly convert between thousands of units with an intelligent search and autocomplete feature. This app offers a streamlined interface, an integrated calculator, and the ability to save favorite conversions. It supports over 6,400 units across 51 categories, making it a comprehensive tool for all 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
Unit Converter 2021#3

Unit Converter 2021 by 巧春 魏

unit conversion 2020
Worth Considering
🔧 Utilities
4.7😊(408 ratings)
FreeAdsIn-App Purchases
Unit Converter 2021 screenshot 1
Unit Converter 2021 screenshot 2
Unit Converter 2021 screenshot 3
Unit Converter 2021 screenshot 4
Unit Converter 2021 screenshot 5
Unit Converter 2021 screenshot 6

This app offers a streamlined unit conversion experience, focusing on clarity and ease of use. It avoids common frustrations found in other converters by clearly displaying unit names and abbreviations, and by offering a simple, intuitive interface. Convert everyday units like length, weight, and temperature with confidence.

What We Love

  • 👍 Simple and intuitive user interface
  • 🎨 Clean, attractive design
  • ⚡ Fast and accurate conversions
  • 💰 Affordable ad-free premium option

Room to Improve

  • 🐛 Ads persist after purchasing premium
  • 🐛 App crashes or won't open after purchase
  • ❌ Missing support/broken support links

More Metric Conversion Unit apps to explore

4
Imperial - Metric Conversions
Imperial - Metric Conversions
Imperial - Metric Conversions
Imperial to Metric Units
Free
📊 Productivity
(0)
5
Uniter: Smart Unit Conversion
Uniter: Smart Unit Conversion
Uniter: Smart Unit Conversion
Convert Metric & US Imperial
Free

Effortlessly convert units of measurement directly within text, websites, or even through your camera. This utility automatically detects and converts units to your preferred system, supporting a vast array of measurement types.

Automatic unit conversionLive side-by-side converterFile import for conversion
🔧 Utilities
(69)
free with in-app purchases
6
Unit Converter - Best Unit App
Unit Converter - Best Unit App
Unit Converter - Best Unit App
Convert All Units and Currency
Free

Easily convert between a wide range of units across 20 categories, including length, weight, temperature, and more. Features live currency updates for 155 world currencies, refreshed daily. Designed for simplicity and visual appeal.

20 conversion categoriesLive currency updates155 world currencies
✈️ Travel
(191K)
free with in-app purchases
7
Unit Converter - Convert all
Unit Converter - Convert all
Unit Converter - Convert all
Measurements & Calculations
Free

Easily convert between various units of measurement, including currencies, temperature, length, and weight. This intuitive tool provides real-time currency exchange rates and a comprehensive list of conversions for everyday use.

Real-time currency conversionsExtensive unit categories (weight, temp, length, volume, etc.)Simple and intuitive interface
✈️ Travel
(13K)
free with in-app purchases
8
Conversion Calculator - Metric
Conversion Calculator - Metric
Conversion Calculator - Metric
Unit Converter & Measurements
Free

Easily convert between metric and imperial units for weight, length, temperature, area, and time. This app offers precise, fast results with a clean interface, working offline for daily, travel, school, or work needs.

Metric and imperial unit conversionWeight, length, temperature, area, timeOffline functionality
🔧 Utilities
(157)
free with in-app purchases
9
Metric/Imperial Units
Metric/Imperial Units
Metric/Imperial Units
by Kraig Wastlund
Free

Easily convert between metric and imperial units for common measurements like temperature, length, mass, and speed. This tool offers a straightforward way to switch between measurement systems.

Imperial to Metric conversionMetric to Imperial conversionTemperature conversion
📊 Productivity
(1)
free
10
Units - Pro Unit Converter
Units - Pro Unit Converter
Units - Pro Unit Converter
by Homegrown Software Ltd
Free

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.

Hundreds of units across 43 categoriesDaily updated currency exchange ratesHide unused units
🔧 Utilities
(150)
free with in-app purchases
11
Unit Ease - Metric vs Imperial
Unit Ease - Metric vs Imperial
Unit Ease - Metric vs Imperial
Accurate unit conversion.
Free

This app offers accurate unit conversions for a wide range of categories including weight, length, temperature, and volume. It also provides specialized size charts for clothing and rings, along with everyday and scientific conversion tools. Users can customize display formats and enjoy a visually appealing interface.

Seamless unit conversionDedicated size chartsEveryday life conversions
🔧 Utilities
(72)
free with in-app purchases
12
Convert Units: Unit Conversion
Convert Units: Unit Conversion
Convert Units: Unit Conversion
Metric to US Converter tool
Free

Easily convert between metric and imperial units for everyday needs. Offers a wide range of converters including currency, temperature, and length, with offline access and a favorites list for quick use.

Metric to imperial conversionsOffline accessFavorites list
🔍 Reference
(3)
ad-supported
13
CNVRT: SI Unit Conversion Tool
CNVRT: SI Unit Conversion Tool
CNVRT: SI Unit Conversion Tool
Convert US Metric Measurements
$4.99

Instantly convert over 200 units across 20 measurement categories, from weight and length to temperature and data storage. This tool simplifies metric and Imperial conversions for STEM professionals and everyday users alike.

Over 200 units supported20 measurement categoriesInstant conversions
🔧 Utilities
(19)
paid
14
Unitify - Unit Conversion
Unitify - Unit Conversion
Unitify - Unit Conversion
Unit conversion
Free
🔧 Utilities
(0)
15
Metric Unit Converter
Metric Unit Converter
Metric Unit Converter
by A1Brains Infotech
Free

This application provides a comprehensive tool for converting a wide range of metric units across various categories. It's designed for everyday use, financial transactions, and professional applications in fields like real estate and engineering.

Extensive unit conversion categoriesReal-time currency conversionUseful for daily life and professional use
🔧 Utilities
(3)
free
16
Shiftz Unit: Global Scale
Shiftz Unit: Global Scale
Shiftz Unit: Global Scale
by Olmez Sabri
Free
🔧 Utilities
(0)
17
Unit Converter: Mila's Tools
Unit Converter: Mila's Tools
Unit Converter: Mila's Tools
Conversion Calculator PLUS
Free

This app offers a comprehensive unit conversion tool with over 300 units across 27 categories. It supports compound units, date calculations, and conversions between various number systems, including historical units. The interface is designed for ease of use with smart keyboards and customizable display options.

27 conversion categories300+ unitsCompound unit support
🔧 Utilities
(1.4K)
free with in-app purchases
18
Metric Practice
Metric Practice
Metric Practice
by Carolina Biological Supply
Free
🛍️ Shopping
(0)
19
Converter (unit conversions)
Converter (unit conversions)
Converter (unit conversions)
by Brent Royal-Gordon
Free

Easily convert between 76 measurement units across eight common types, including length, weight, temperature, and volume. Features a built-in calculator and optional currency conversion with daily exchange rate updates.

76 measurement units8 common unit typesBuilt-in four-function calculator
🔧 Utilities
(1.9K)
free with in-app purchases
20
Unit Converter - Pro Units App
Unit Converter - Pro Units App
Unit Converter - Pro Units App
Convert Any Unit
Free

This app offers a powerful and user-friendly unit converter with 16 categories, including currency, length, and temperature. It allows for custom unit lists and provides live exchange rate updates for 148 currencies. Unlock all features with a one-time in-app purchase.

16 conversion categoriesCustom unit listsLive currency exchange rates
🔍 Reference
(16K)
free with in-app purchases

FAQ about Metric Conversion Unit

What are the best metric conversion unit apps for iPhone?
Metric Conversion tool tops our metric conversion unit apps ranking as of August 2026, with a 4.8-star average from 15K App Store ratings, and it's free to download.
Yes — 19 of the top metric conversion unit apps we rank are free to download, including Metric Conversion tool and Convert Any Unit Lite.
Metric Conversion tool has no ads and has no in-app purchases, according to its App Store listing as of August 2026.
We track 239+ metric conversion unit apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
The app is a comprehensive unit and currency converter. It allows users to convert between a vast number of units, including weight, temperature, length, area, volume, speed, time, angle, pressure, and currency. It aims to provide accurate conversion results with a user-friendly interface.
Key features include an easy-to-use interface, offline functionality, support for over 30,000 unit conversions, and over 160 currencies with live exchange rates. It also allows users to store favorite conversions for quick access and provides answers in fractions where needed, with results up to 5 decimal places.