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Unit Converter - Best Unit App

Unit Converter - Best Unit App

Convert All Units and Currency

191K ratings
1569 reviews
With Ads#119 in top-grossing Travel
🔧 Utilities
✈️ Travel
Free
In-App PurchasesWith Ads

Details

  • Released
  • Updated
  • March 26, 2013
  • December 2, 2025

Features

Developer

Alan Mrvica
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Unit Converter - Best Unit App screenshot #1 for iPhone
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Unit Converter - Best Unit App screenshot #10 for iPhone
iphone
ipad
📈no. 119
Charts↘︎
📌Ready
Reviews summary↘︎
⭐1.6K
Reviews↘︎
📝40+ tags
Tags↘︎
🔄6+ apps
Alternatives↘︎
❓5 answered
FAQ↘︎
📦w/o updates
Updates frequency↘︎
🖼️Get Icon
Icons↘︎

About

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 categories
✓Live currency updates
✓155 world currencies
✓Daily exchange rate refresh
✓Simple and beautiful design
✓Swap units functionality
Show original description

What users say

Summarized from real user reviews of Unit Converter. Based on 191K reviews and a 4.8/5 average, it highlights the 5 positives and 4 negatives reviewers mention most about this Travel app.

Positive things

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

Negative things

  • 🐛Limited character input
  • 🐛Difficulty with negative numbers
  • 💡Lack of ability to quickly switch between conversions
  • 💰Pro version not worth the cost
See all reviews

What's New in Unit Converter

10.2

December 2, 2025

Fixed typo error in Weight category

Subscription plans

Premium

Unlimited Access to All Features for 1 Year

$24.991 Year
7 Days trial
How to cancel Unit Converter subscription ⁉️

Charts

Top Grossing

📈 119+20

Travel

This app rose +20 positions in Travel chart.

Last updated on August 9, 2026.

User reviews

Most RecentHighest RatedLowest Rated

At Your Finger Tips

Quick and easy conversations
w.thomsonw.thomson

Works

The only one you need. It’s my go to.
HfifidjuvtgjdkixhgsjxyhehhxjjcHfifidjuvtgjdkixhgsjxyhehhxjjc

Unit converter

This app used to be easy to operate, but not now. Too many ads pop-up, and are hard to get out of. Then the premium sales pitch comes up and offers you add free for sale. It used to be an easy, useful free app. It’s very disappointing that is no longer the case.
Terri JarvisTerri Jarvis

Meh this converter sucks

The app was good then they started putting ads in it
stupid detailstupid detail

Best

When you don’t know this takes that problem away. Very good app
WTK artistWTK artist
See 1564 more reviews

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User experience

🐞

Reported Bugs

2 issues

Forced 5-star review prompt

Bug

Inaccurate weight/stone conversion

Bug
✨

Requested Features

3 requests

Add calorie/kJ conversion

Feature

Allow negative number input

Feature

Improve ability to quickly switch between conversions

Feature

FAQ

What does this app do?

This app is a comprehensive unit and currency converter. It allows you to convert between a wide variety of units across 20 different categories, such as length, weight, temperature, and area. It also provides live updates for currency exchange rates for 155 world currencies.

What are the key features of this unit converter?

Key features include conversion for 20 categories of units, live daily updates for 155 world currencies, a simple and beautifully designed interface, and the ability to easily swap units with a button press on the keypad.

How does the currency conversion work and is it free?

Currency exchange rates are downloaded once a day when the app is opened, requiring an internet connection. Each download uses a very small amount of data. The app is free to download and use, but may offer in-app purchases or contain ads.

What types of units can I convert?

You can convert units across 20 categories including Angle, Area, Currency, Data (computer and network speed), Energy, Force, Fuel-Mileage, Length, Pants, Power, Pressure, Shoes, Speed, Temperature, Time, Tops-Clothing, Torque, Volume, and Weight-mass.

Is an internet connection required to use the app?

An internet connection is required to download the daily currency exchange rates. Once downloaded, you can perform unit conversions offline. The data usage for currency updates is minimal, around 1-2kb per download.