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Unit Converter - Convert all

Unit Converter - Convert all

Measurements & Calculations

14K ratings
1058 reviews
With Ads
🔧 Utilities
✈️ Travel
Free
In-App PurchasesWith Ads

Details

Released
February 21, 2011
Updated
October 16, 2026

Features

Developer

oWorld Software
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Unit Converter - Convert all screenshot #9 for iPhone
iphone
ipad
watch
🧾$0.99 - $29.99
In-App Purchase↘︎
📌Ready
Reviews summary↘︎
⭐1.1K
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📝40+ tags
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🔄6+ apps
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❓5 answered
FAQ↘︎
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About

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 conversions
✓Extensive unit categories (weight, temp, length, volume, etc.)
✓Simple and intuitive interface
✓Supports international currencies
✓Includes time, speed, and IT units
✓Unlockable premium units
Show original description

What users say about Unit Converter

Reviews of Unit Converter are mixed: the Travel app is rated 4.6/5 from 14K App Store ratings. What users like most: easy to use, comprehensive unit conversions. Top complaints: too many ads, ads make the app unusable. Summarized from real user reviews.

Positive things

  • 🚀Easy to use
  • 🚀Comprehensive unit conversions
  • 👍Helpful app
  • 👍Practical for engineering and mechanics
  • 👍Intuitive interface
  • 👍Extremely useful
  • 👍Convenient and always available

Negative things

  • 🔍Too many ads
  • 🔍Ads make the app unusable
  • 🔍Ads are invasive and disrupt user experience
  • 💰Expensive subscription for ad-free version
  • 🐛Crashes and stability issues
  • 🔍Ads block access to features
See all reviews
+1

What's New in Unit Converter

3.0.29

October 16, 2026

What's new: • New Turkey Roasting calculator, just in time for Thanksgiving: enter the turkey weight or your guest count and get roasting time, oven and doneness temperatures, resting and thawing times, based on USDA guidelines. Big crowd? It tells you when to roast two turkeys instead of one. • Better layout on iPad and large screens. • More precise conversions: every unit now uses its exact official definition. • Long category names now fit their tiles. • Bug fixes.

More
12

Subscriptions & In-App Purchases

Get premium

No ads, all conversions and future updates.

$14.991 Year
7 Days trial
Price Updates
October 14, 2026→$14.99
June 26, 2026→$5.99
June 22, 2026→$9.99
June 19, 2026→$9.99
How to cancel Unit Converter subscription ⁉️

User reviews

Most RecentHighest RatedLowest Rated

Terrible

chrome ad at the beginning is annoying. Also does allow you to pick what units to convert to. Just bombards you with every unit. Irritating and I deleted it.
RRobAnybody1234

Fonctionne bien

Trop d’annonce
…….,!?!?!

Response from developer

Désolé pour ça. La pub finance la version gratuite, l'option Pro dans les réglages retire toutes les pubs. Dites moi depuis l'app si une pub vous bloque.

Ads!!

Used to be really helpful app. now there are loads of ads or a subscription. I’d happily pay a one-off payment of a couple of ££ for this app but not a subscription when you just ask Google or Siri and wait a few seconds for the info.
P0Pegwin 01

Response from developer

Thanks for your feedback. There is a one-time option too, the Lifetime deal on the Pro screen, you pay once and the ads are gone for good, no subscription. Let me know from the app if you don't see it.

Easy to Navigate

Very user friendly app
Sswilpit

Response from developer

Thanks a lot! Let me know from the app if you miss a unit.

Conversion needed every day.

Not know is like taking away the answer to the question and then asking to demonstrate that answer
Ccrockybodies
See 1053 more reviews

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User experience

🐞

Reported Bugs

3 issues

Conversion calculations are sometimes inaccurate

Bug

Inability to enter decimal values in some conversions

Bug

Compatibility issues with newer devices

Bug
✨

Requested Features

4 requests

Dark mode option

Feature

Favorites/frequently used units

Feature

Improved ad-supported free version

Feature

More customization options

Feature

FAQ

What does the Conversion Calculator app do?

This app functions as a comprehensive unit and currency converter. It allows users to easily convert between various units of weight, temperature, length, volume, time, speed, and more. It also provides real-time currency exchange rates for international currencies.

What are the key features of this conversion app?

Key features include real-time currency conversions with live exchange rates, a wide array of unit categories such as weight, temperature, length, and volume, and an intuitive interface for quick conversions. It also supports specialized units for IT, energy, and fuel consumption.

How much does the Conversion Calculator app cost?

The app is free to download and use, with ads displayed. Users can opt for 'Converter Premium' via an auto-renewable subscription to remove ads and unlock additional units. Subscription options include a 1-year renewal for $9.99 (with a 7-day free trial) or a 1-month renewal for $0.99.

What types of units can be converted?

The app supports a vast range of units including weight (ounces, pounds, kilograms), temperature (Celsius, Fahrenheit, Kelvin), length (miles, kilometers, feet, meters), volume (liters, gallons, cups), time, speed, computer memory, energy, fuel consumption, and electricity. It also includes currency conversions for major global currencies and cryptocurrencies.

Who would benefit from using this app?

This app is ideal for cooks, contractors, DIY enthusiasts, travelers, students, and anyone who frequently needs to convert measurements or currencies. Its ease of use and comprehensive conversion options make it a valuable tool for everyday tasks and international dealings.