Are you looking for an easy and accurate way to convert units or currencies on your mobile device? Look no further than our list of the 20 best conversion apps for Android and iPhone, including Unit Converter, All, and Currency Converter Plus!
| App | Logo | Available On | Reviews | Downloads | Features |
|---|---|---|---|---|---|
| 1. Unit Converter |  | Android, iOS | 4.8/5 | 17M+ | Intuitive simple UI, Essential unit sets, Sorted into categories |
| 2. All |  | Android, iOS | 4.9/5 | 14M+ | 75+ FREE Calculators, Simple or Scientific, Completely FREE |
| 3. Currency Converter Plus |  | Android, iOS | 4.9/5 | 12M+ | Live exchange rates, Multiple currency fields, Built-in currency calculator |
| 4. Unit Converter |  | Android, iOS | 4.8/5 | 9M+ | Real-time currency converter, 72 unit categories, Smart tools (bubble level) |
| 5. Unit Converter Ultimate |  | Android, iOS | 4.5/5 | 1M+ | Simple and intuitive, Converts any unit, Beautiful design |
| 6. Unit converter, Convert metric |  | Android, iOS | 4.6/5 | 962K+ | Intuitive interface, Converts all units, Built-in calculator |
| 7. Convertbee |  | Android | 4.3/5 | 326K+ | Offline functionality, Customizable favorites, Instant search results |
| Load more |
1. Unit Converter
Easy and simple UI, 4 essential categories, Supports various units
Cost: Unit Converter (Free), Unit Converter Pro ($1.99)
Introducing Unit Converter, the indispensable mobile app that empowers you with effortless conversions at your fingertips. For years, users like you have relied on this app as their go-to solution for a wide range of conversions. Whether you're navigating international currency exchanges, deciphering recipes with unfamiliar measurements, or simply satisfying your curiosity about different units, Unit Converter has you covered.
Seamlessly convert between imperial, metric, and other units with lightning-fast accuracy. Its intuitive interface and on-the-fly conversions make it a breeze to obtain the information you need. For those who demand precision, Unit Converter provides laboratory-grade accuracy, ensuring reliable results even for critical applications.
Download:
Application information:
| Downloads | Over 10 million downloads |
| Features | Converts various units such as length, weight, volume, temperature, time, speed, pressure, data storage, and more, with a built-in currency converter. |
| Pros | Simple UI, wide range of units, quick conversions, offline functionality. |
| Cons | Occasional ads, some unit categories lack comprehensive options, requires internet for currency conversion, basic design. |
- Tags:
- Intuitive UI
- Simple to use
- Essential unit sets
✨ Read more: app for compound interest
2. All
75+ FREE Calculators, Simple or Scientific, Unit & Currency Converter
Cost: All-In-One Calculator (Free)
All is a comprehensive conversions app that has everything you need to convert any type of unit, from temperature to weight to shoe size. It's the perfect app for students, travelers, and anyone who needs to do quick and easy conversions.
With All, you can convert between any two units of measure, and it will show you all the calculations in between. This makes it easy to see how the conversion is done and to check your work. All also has a built-in calculator, so you can do simple calculations without having to open another app.
Download:
Application information:
| Downloads | Over 10 Million |
| Features | Offers a wide range of calculators, unit converters, currency converters, and mathematical tools for various purposes like finance, health, math, and everyday life. |
| Pros | Versatile, user-friendly, regularly updated with new features, and completely free. |
| Cons | Can be overwhelming due to the sheer number of options, occasional ads, and some advanced features might require a subscription. |
- Tags:
- 75+ Calculators & Converters
- Simple & Scientific Calculator
- Free, complete, easy to use
✨ Read more: app for fractions
3. Currency Converter Plus
Live exchange rates, Currency calculator, Offline mode
Cost: Free (Free), Pro ($4.99)
Planning a trip abroad can be daunting when it comes to currency conversions. Currency Converter Plus is here to alleviate your worries, offering real-time exchange rates and a user-friendly calculator to seamlessly convert between currencies, ensuring you make informed financial decisions while traveling. With its precise conversions, you can accurately budget for tours, accommodations, and transportation, empowering you to confidently navigate foreign markets.
This app's customization options cater to your specific needs. Whether you prefer to display only the currencies you require, such as USD and GBP, or quickly switch between different currencies, Currency Converter Plus adapts effortlessly. Its intuitive design allows you to compare prices across countries, helping you maximize your purchasing power and secure the best deals wherever you go. Its popularity among travelers is a testament to its reliability and effectiveness in making currency conversions a breeze.
Download:
Application information:
| Downloads | Over 10 million downloads |
| Features | Offers live exchange rates for 180+ currencies, a built-in calculator, historical charts, offline mode, and supports popular cryptocurrencies. |
| Pros | User-friendly, accurate rates, offline functionality, charts for tracking trends. |
| Cons | Contains ads, some features require a subscription, occasional lag with live updates, limited historical data depth. |
- Tags:
- Live AccuRate™ Rates
- Multiple Currency Fields
- Historic Exchange Charts
✨ Read more: app for converting jpg to pdf
4. Unit Converter
Wide range of categories, Easy to use interface, Real-time currency converter
Cost: Unit Converter (Free), Unit Converter Pro ($1.99)
Unit Converter is the go-to app for quick, easy, and accurate conversions. Whether you're an engineer on a distant site or a silver smith working with metric and imperial units, this app has you covered. With its clear and effective interface, you can convert between a wide range of units, from currency to temperature to weight and length.
The app is highly customizable, allowing you to choose your favorite conversions for easy access. Plus, the premium version supports the makers, artists, and service providers who work hard to create great apps like this one. So if you're looking for a reliable and comprehensive conversion app, Unit Converter is the perfect choice.
Download:
Application information:
| Downloads | Over 9 Million Downloads |
| Features | Offers a wide range of unit conversions including currency, weight/mass, temperature, length, area, volume, speed, time, pressure, energy, power, and more. Includes a built-in calculator with both basic and advanced scientific functions, supporting engineering notations. |
| Pros | User-friendly interface, comprehensive unit selection, regular updates. |
| Cons | Requires internet access for currency conversions and occasional ads might be disruptive for some users. |
- Tags:
- 70+ Unit Categories
- 12700+ Unit Conversions
- Real-time currency converter
5. Unit Converter Ultimate
Simple and intuitive, Covers all conversions, Beautiful UI
Cost: Unit Converter Ultimate - Free with Ads (Free), Unit Converter Ultimate - Paid ($0.99)
Unit Converter Ultimate is a must-have app for anyone who needs to convert units on the go. With a huge range of conversions available, it can handle any job you'll ever need.
The app is incredibly easy to use, with a simple and intuitive interface. Just enter the value you want to convert, select the input and output units, and the app will do the rest. You can even save your favorite conversions for quick and easy access later.
Download:
Application information:
| Downloads | Over 1 million downloads |
| Features | Offers a wide range of units across various categories like length, weight, temperature, volume, time, speed, power, energy, and more, with a simple and intuitive interface. |
| Pros | Comprehensive, easy to use, and supports a vast number of units. |
| Cons | Can be slow to load at times, contains ads, and lacks some advanced features found in paid unit converter apps. |
- Tags:
- Easy to use
- Beautiful Design
- Quick conversions
6. Unit converter, Convert metric
Intuitive interface, Converts all units, Powerful calculator
Cost: Unit Converter (Free), Unit Converter Pro ($0.99)
With Unit converter, Convert metric mobile app, you can now convert any unit, be it metric, distance, volume, or currency, easily and quickly. The app features a user-friendly interface, making it convenient for quick conversions on the go.
Despite occasional issues with English translation and intrusive ads, the app remains a handy tool for everyday use. Users appreciate its simplicity and accessibility, making it a go-to choice for quick unit conversions. However, some users may prefer alternatives with more advanced features and a more polished user experience.
Download:
Application information:
| Downloads | Over 900,000 downloads |
| Features | Provides conversions for a wide range of units including length, weight, volume, temperature, time, speed, pressure, data storage, and more. |
| Pros | Simple, user-friendly interface with a wide variety of conversion options. |
| Cons | Contains ads and lacks some advanced features found in paid unit converter applications. |
- Tags:
- Easy to use
- Multiple units
- Accurate conversions
7. Convertbee
Offline availability, Customizable unit lists, Instant search results
Cost: Convertbee Free (Free), Convertbee Pro ($1.99)
Convertbee is a must-have app for anyone who needs to make quick and easy conversions between different units and currencies. With its simple and intuitive interface, Convertbee makes it a breeze to convert between kilometers and miles, Fahrenheit and Celsius, kilograms and pounds, and a wide range of other units.
One of the best things about Convertbee is that it's completely free to use, with no ads or in-app purchases. This makes it a great option for students, travelers, and anyone else who needs a reliable conversion tool.
Download:
Application information:
| Downloads | Over 300,000 downloads |
| Features | Offers currency conversion with live rates for over 150 currencies, unit conversion across various categories like length, weight, volume, temperature, and more. |
| Pros | User-friendly interface, offline functionality, regular updates, and completely free. |
| Cons | Lacks some advanced conversion features found in specialized apps, occasional ads might be disruptive. |
- Tags:
- Offline Functionality
- Customizable favorites
- Instant search results
8. Unit Converter
Convert 27+ unit categories, Instant unit conversions, Bookmark frequent conversions
Cost: Unit Converter (Free), Unit Converter Pro ($1.99)
Introducing Unit Converter, the go-to app for effortless conversions across various categories. With its user-friendly design, this app boasts a wide range of conversion options, from distance and temperature to food and electrical units. Its intuitive interface and lightning-fast performance make it a breeze to switch between units, ensuring accuracy and convenience.
Unit Converter stands out with its commitment to user satisfaction. Free of intrusive ads or spyware, it prioritizes privacy and delivers a seamless conversion experience. Its developers are highly responsive to feedback, promptly addressing user requests and enhancing the app's functionality. As a result, Unit Converter has garnered exceptional user reviews, with praises for its clean aesthetics, comprehensive features, and dedication to user needs.
Download:
Application information:
| Downloads | Over 100,000 downloads |
| Features | Converts various units such as length, weight, volume, temperature, time, speed, and currency; includes a built-in calculator for convenience. |
| Pros | User-friendly interface, wide range of units, offline functionality. |
| Cons | May occasionally show ads, some advanced conversion features might require a paid upgrade. |
- Tags:
- 27 Unit Categories
- Instant Conversions
- Bookmark Favorites
9. US
Works fully Offline, No annoying Ads, Highest rated converter
Cost: US - Free (Free), US - Paid ($0.99)
Introducing US, the ultimate offline conversion app for your mobile device. With its sleek, user-friendly design, US empowers you to effortlessly convert between US and metric units, making calculations a breeze. Free from distracting advertisements, US offers a seamless and efficient conversion experience.
As fellow users attest, US excels in its functionality and layout. Its responsive interface allows for quick and accurate calculations, while its innovative design ensures easy navigation. The app's vibrant orange background adds a touch of cheerfulness to your conversion tasks, making them less mundane and more enjoyable. Whether you're a seasoned cook seeking precise ingredient measurements or a traveler navigating unfamiliar units, US is the perfect companion for all your conversion needs.
Download:
Application information:
| Downloads | Over 88,000 |
| Features | Provides a wide range of unit conversions, including length, weight, volume, temperature, speed, and more, all available offline. |
| Pros | User-friendly, accurate conversions, works offline. |
| Cons | Limited to US and metric units, lacks advanced conversion features or a modern UI. |
- Tags:
- Offline usage
- No annoying ads
- 20+ Categories
10. All Unit Converter & Tools
Extensive Unit Conversions, Handy Built-In Tools, Precise Calculations
Cost: Free (Free), Premium ($1.99)
Experience ultimate convenience with All Unit Converter & Tools, the comprehensive mobile app that caters to all your conversion needs. Whether you're a student, professional, or simply someone who deals with various units on a daily basis, this app has you covered. With an extensive range of conversion categories and the added bonus of handy tools like a compass and periodic table, All Unit Converter & Tools empowers you to tackle any conversion task with ease.
Despite its impressive functionality, the app does have a minor drawback: navigating the conversion categories can be a bit time-consuming due to the lack of a search bar. However, this is a small inconvenience compared to the wealth of features and conversions it offers. Whether you're converting currencies, temperatures, or measurements, All Unit Converter & Tools is the perfect solution, providing accurate and reliable results every time.
Download:
Application information:
| Downloads | Over 50,000 |
| Features | Provides a wide range of unit conversions, including currency, weight, temperature, length, and more. Also includes tools like a compass, speedometer, level, calculator, and more. |
| Pros | User-friendly interface, comprehensive unit conversions, convenient extra tools. |
| Cons | May contain ads, some tools may require internet access for full functionality, accuracy of tools like the compass can be affected by surroundings. |
- Tags:
- Extensive Unit Conversions
- Handy Utility Tools
- Precise Calculations
11. Instant Currency Converter
Offline currency conversion, Historical currency charts, Built-in currency calculator
Cost: Instant Currency Converter (Free), Instant Currency Converter Premium ($4.99)
For travelers who want to make informed purchases abroad, the Instant Currency Converter app is a must-have. This user-friendly app automatically converts any input in any currency, making it easy to compare prices and avoid being overcharged.
Despite its simplicity, Instant Currency Converter is a powerful tool that can save you money. As one user commented, the app was "helpful with exchange rate" and allowed them to understand the true price of items while traveling in Costa Rica. Another user appreciated the app's ability to provide "informed information" about exchange rates, which helped them avoid being taken advantage of by shopkeepers.
Download:
Application information:
| Downloads | Over 70,000 downloads |
| Features | Provides live exchange rates, historical charts, a built-in calculator, offline mode, and supports a wide range of currencies. |
| Pros | User-friendly, accurate rates, convenient offline mode, feature-rich. |
| Cons | May consume some battery life due to background updates, occasional ads might be disruptive. |
- Tags:
- Offline currency conversion
- 450+ currencies supported
- Real-time exchange rates
12. Easy Currency Converter
Real-time rates, Offline functionality, No ads, no purchases
Cost: Free (Free), Remove Ads ($0.99)
Easy Currency Converter is a must-have app for frequent travelers and anyone dealing with multiple currencies. Its user-friendly interface and ad-free experience make it a standout in the crowded app market. With over 400 currencies and cryptocurrencies at your fingertips, you can easily convert and compare rates in real-time.
One of the app's most praised features is its lack of advertisements. As one user put it, this is "so rare nowadays." However, users have suggested adding the ability to reorder currencies in the selected list. This would be particularly beneficial for non-US users and those who frequently travel. Additionally, the app could benefit from adding 1000s delimiters in values and addressing a minor issue where the app temporarily updates values upon opening, potentially causing input errors.
Download:
Application information:
| Downloads | Over 60,000 downloads |
| Features | Converts 400+ currencies and cryptocurrencies with real-time rates, offline mode, historical charts, favorites list, and no ads. |
| Pros | User-friendly, reliable rates, comprehensive features, ad-free experience. |
| Cons | Offline mode requires occasional online sync, limited historical data, no advanced calculator features. |
- Tags:
- Real-time rates
- 150 currencies
- Offline Functionality
13. Unit Converter Pro
Simple and easy UI, No ads, 4 categories for easy use
Cost: Unit Converter Pro (Free), Unit Converter Pro (AdFree) ($0.99)
Unit Converter Pro is the best unit converter out there, and it's a must-have for anyone who needs to convert measurements between different units. It's easy to use and has a wide range of conversion options, making it perfect for a variety of tasks.
One of the things that sets Unit Converter Pro apart from other converters is its ability to copy and paste results. This is a huge time-saver, especially if you're working with a lot of different conversions. The app also has a built-in calculator, so you can perform simple calculations without having to switch to a different app.
Download:
Application information:
| Downloads | Over 1 million downloads |
| Features | Offers a wide range of unit conversions including currency, weight, length, temperature, speed, volume, area, and more with a user-friendly interface. |
| Pros | Simple, easy to use, accurate conversions, and supports a wide array of units. |
| Cons | Contains ads, may lack some advanced features compared to other paid unit converters, and requires internet access for currency conversions. |
- Tags:
- Intuitive UI
- No advertisements
- Essential unit sets
14. Unit Converter & Calculator
All-in-one conversions, Easy-to-use interface, Accurate calculations
Cost: Unit Converter & Calculator (Free)
Unit Converter & Calculator is an incredibly handy and versatile mobile app that empowers you to convert between a vast array of units of measurement with remarkable accuracy. Its intuitive interface and extensive conversion capabilities make it an indispensable tool for professionals, students, and anyone who frequently deals with different units of measurement.
Whether you're a scientist grappling with complex calculations or a home cook seeking precise conversions for your recipes, Unit Converter & Calculator has got you covered. Its comprehensive database of units encompasses everything from length and weight to temperature and currency, ensuring that you always have the right tool for the job.
Download:
Application information:
| Downloads | Over 60,000 downloads |
| Features | Provides a wide range of unit conversions, including length, weight, temperature, volume, time, speed, and more, along with a built-in calculator. |
| Pros | User-friendly interface, comprehensive unit conversions, convenient calculator. |
| Cons | May require internet access for some conversions, occasional ads may be present, limited to basic calculations. |
- Tags:
- All-in-one unit conversion
- Easy-to-use interface
- Wide range of unit categories
15. Convertir
Converts lengths, masses, areas, volumes and capacities, Multiple conversion methods: table, equivalencies
Cost: Convertir (Free)
Introduction:
Meet Convertir, the ultimate conversion tool for your mobile device. With Convertir, you can effortlessly convert between a wide range of units, making it the perfect companion for students, travelers, and anyone who needs to make quick and accurate conversions.
Description:
As a comprehensive conversion app, Convertir covers a vast array of categories, including lengths, masses, areas, volumes, and capacities. Its user-friendly interface makes it easy to navigate and find the specific conversion you need. Whether you're converting kilometers to miles or gallons to liters, Convertir has you covered.
Download:
Application information:
| Downloads | 17,000+ |
| Features | Converts between various units of measurement, including lengths, masses, areas, volumes, and capacities. |
| Pros | Simple, efficient, and perfect for quick everyday conversions. |
| Cons | Outdated interface, limited advanced features, and only available on the Google Play Store. |
- Tags:
- Interactive exercises
- Multiple conversion methods
- Clear and intuitive interface
16. Essential Unit Converter
Multi-category conversion, User-friendly interface, Accurate and reliable
Cost: Free (Free), Pro ($0.99)
Essential Unit Converter is an incredibly useful app for anyone who needs to make conversions on the go. With a wide range of units and categories to choose from, this app has you covered for everything from cooking to carpentry. Whether you're trying to convert cups to ounces or miles to kilometers, Essential Unit Converter has you covered.
Best of all, Essential Unit Converter is completely free to use. So if you're looking for a handy and reliable conversion tool, look no further than Essential Unit Converter. It's the perfect app for anyone who wants to make conversions quickly and easily.
Download:
Application information:
| Downloads | Over 16,000 downloads |
| Features | Provides conversions for a variety of units including length, weight, volume, temperature, time, speed, and more. |
| Pros | Simple, easy-to-use interface with a clean and intuitive design. |
| Cons | Limited functionality compared to other unit converter apps, may lack some specific unit conversions. |
- Tags:
- Multi-category conversion
- User-Friendly Interface
- Accurate and reliable conversions
17. Useful Units Recipe Converter
Automatic recipe scanning, Volume to weight conversions, 400+ ingredients supported
Cost: Useful Units Recipe Converter (Free), Useful Units Recipe Converter Pro ($4.99)
Introducing Useful Units Recipe Converter, the ultimate solution for effortless recipe conversions on your mobile device. This intuitive app seamlessly transforms ingredient quantities between metric and US units, as well as volume and weight measurements. With over 400 supported ingredients, you can confidently tackle any recipe, eliminating the hassle of manual calculations.
Despite its versatility, Useful Units Recipe Converter remains incredibly user-friendly. Simply scan your recipe, and the app instantly converts all ingredients with precision. Its comprehensive ingredient database ensures accuracy, while the swipe function allows you to easily load multiple recipes. However, one user noted a minor oversight: the app doesn't recognize the abbreviation "c." for cups. Nevertheless, its overall functionality and ease of use make it an indispensable tool for home cooks and professional chefs alike.
Download:
Application information:
| Downloads | Over 4000 downloads |
| Features | Scans entire recipes to instantly convert between metric and US units, volume and weight measurements, covering over 400 ingredients. |
| Pros | Simple, efficient, and accurate conversions for diverse ingredients. |
| Cons | Requires a subscription after the trial period, limited functionality beyond unit conversions, and occasional issues with handwriting recognition. |
- Tags:
- Auto recipe text recognition
- Volume to weight conversions
- Unlimited unit conversions
18. All in One Unit Converter Pro
Supports both Metric and Imperial Units, Smart tools for engineering calculations
Cost: All in One Unit Converter Pro ($0.01), All in One Unit Converter (Free)
Introducing the ultimate conversion tool for your mobile device: All in One Unit Converter Pro. With this comprehensive app, you'll have everything you need for effortless and precise calculations. Whether you're a student, professional, or simply someone who appreciates convenience, All in One Unit Converter Pro has got you covered.
As one satisfied user exclaimed, "Love this app! It has everything I could ever need and more." True to their words, this app boasts an extensive range of conversion categories, ensuring that you're never left without the right tool for the job. Its user-friendly interface and intuitive navigation make it a pleasure to use, even for those who are new to unit conversions.
Download:
Application information:
| Downloads | Over 10,000+ |
| Features | Offers a wide range of unit conversions across various categories like length, temperature, weight, volume, time, speed, and more, alongside scientific calculator functionalities. |
| Pros | Comprehensive, user-friendly, and lightweight with a simple interface. |
| Cons | May contain ads, occasional accuracy issues reported, and limited customization options. |
- Tags:
- Multi-unit conversion
- Scientific calculations
- Metric and Imperial units
19. Unit Converter Calculator Pro
All in One Unit Conversion, Simple & Advanced Tools, Currency Converter
Cost: Unit Converter Calculator Pro - Basic (Free), Unit Converter Calculator Pro - Premium ($0.99)
Introducing Unit Converter Calculator Pro, the ultimate conversion tool for your mobile device. With a comprehensive suite of features, this app empowers you to effortlessly convert between various units of measurement, making your daily calculations a breeze. From basic conversions like length, weight, and volume to advanced scientific and engineering units, Unit Converter Calculator Pro has got you covered.
Despite a few minor glitches reported by users, such as occasional issues with the service tax and currency converter, the app's overall functionality and feature-rich design have earned it a loyal following. Its intuitive interface and user-friendly features make it a pleasure to use, ensuring that you can tackle any conversion task with ease and accuracy.
Download:
Application information:
| Downloads | Over 100,000 downloads |
| Features | Offers a wide range of unit conversions, including length, weight, temperature, volume, time, speed, pressure, energy, power, and more, along with a built-in calculator. |
| Pros | User-friendly interface, comprehensive unit conversions, and offline functionality. |
| Cons | May contain ads, some advanced features might require a premium purchase, and occasional accuracy issues reported with specific conversions. |
- Tags:
- All-in-one conversions
- Simple and user-friendly
- Accurate and reliable
20. Unit Converter Pro+
Comprehensive Conversion, User-friendly Interface, Accurate Calculations
Cost: Free (Free), Pro ($0.99)
Introducing Unit Converter Pro+, an all-in-one conversion tool that empowers professionals with its comprehensive range of options. Whether you're dealing with currencies, temperatures, or measurements, this app has got you covered. Its user-friendly interface and intuitive design make it a breeze to use, even for those new to unit conversions.
As one user exclaimed, "One of the best unit conversion apps on the market." With its vast array of conversions, Unit Converter Pro+ sets itself apart from the competition. It includes conversions that are hard to find on other apps, catering to even the most specialized needs. Its accuracy and reliability make it an indispensable tool for professionals who demand precision in their conversions.
Download:
Application information:
| Downloads | 10,000+ |
| Features | Provides over 500 unit conversions across a wide range of categories, including length, weight, temperature, time, volume, speed, and more. |
| Pros | Comprehensive, user-friendly, regularly updated with new units. |
| Cons | May require a paid subscription to unlock all features, occasional ads may be displayed. |
- Tags:
- Comprehensive Conversions
- Intuitive Interface
- Accurate Calculations