Comparison

Currency vs Unit Converter

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Currency

This app offers an offline currency converter with up-to-date exchange rates for over 160 currencies. It's ideal for travelers needing to convert money abroad without an internet connection. An optional upgrade removes ads and unlocks all features.

Highlights
  • Offline currency conversion
  • 160+ currencies supported
  • Up-to-date exchange rates
  • Travel abroad companion
  • Ad-free option
Features
Currently charting
Read full description

A powerful yet simple currency converter, Currency provides up-to-date exchange rates for over 160 currencies and countries! Great for when you travel abroad. Currency has been the #1 currency converter for iPhone since 2008, launching as one of the first 500 apps in the App Store. Available for iPhone, iPad, and Apple Watch. ——— Upgrade to Currency+ to remove ads & unlock all features. Subscriptions will be charged to your credit card through your iTunes account. Subscription is offered for 1-year periods ($19.99, price may vary by location), and will automatically renew unless canceled at least 24 hours before the end of the current period. You will not be able to cancel the subscription once activated. Manage your subscriptions in Account Settings after purchase. Free trials may only be used once. Any unused portion of a free trial will be forfeited if you purchase a subscription. ——— Terms of Service: http://currencyapp.com/terms/ Privacy Policy: http://currencyapp.com/privacy/

About

Unit Converter

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.

Highlights
  • 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
Features
Read full description

Unit Converter: convert any measurement, currency or size in one tap. IN SHORT A fast, offline unit converter that turns any measurement, currency or clothing size into the answer you need — with live exchange rates and a built-in calculator. If you can use a calculator, you can use this. WHO IT'S FOR Cooks, contractors, DIY-ers, students, travelers and anyone who needs a quick, precise conversion. Also handy for engineers, nurses and online shoppers comparing international sizes. WHAT YOU GET • 18+ categories in one place — weight, length, temperature, volume, speed, area, time, data, energy and more. • Live currency conversion — real-time exchange rates, updated automatically. • A real calculator built in — type an expression and convert the result instantly. • Works offline — every unit (except live rates) converts with no connection. HOW IT WORKS 1) Pick a category from the icon grid. 2) Tap the two units you want and type a value — or a full calculation. 3) Read the precise result instantly, to the number of decimals you choose. KEY FEATURES • Currency — live forex rates for USD, EUR, GBP, JPY and more, plus crypto. • Weight & mass — oz, lb, kg, g, mg, stone, metric tons. • Length & distance — miles, km, yards, meters, feet, inches, cm, mm. • Temperature — Celsius, Fahrenheit, Kelvin, Réaumur, Rankine. • Volume — cups, tbsp, tsp, pints, gallons, liters and metric volumes. • Clothing & shoe sizes — men, women, kids and babies, across countries. • Plus speed, area, pressure, data, energy, fuel and angle. WHY IT HELPS Most people find the unit they need in a couple of taps and never open a second app. Rates stay current, so a EUR→USD check is accurate to the day. FAQ Q: What is it, in one line? A: A unit converter that turns any measurement, currency or size into a precise result using a built-in calculator. Q: Does it work without internet? A: Yes — all units convert offline. Only live currency rates need a connection to refresh. Q: Can it convert currencies in real time? A: Yes, exchange rates update automatically so conversions reflect the current market. DOWNLOAD AND CONVERT Pick a category and get your first conversion in seconds. Naturally, this app helps with unit conversion, the metric system, imperial units, currency exchange, cooking measurements and clothing sizes. Auto-renewable subscription: Unit Converter Premium - Full pack - 1-year renewal - USD 9.99 - available with a 7 days free trial - Full pack - 1-month renewal - USD 0.99 The total amount for the subscription period will be charged to your iTunes Account. Unless you turn it off auto-renewal at least 24 hours before the end of the subscription period, the subscription will renew automatically for the same price and will be charged on to your iTunes Account. You can manage the subscription and turn off automatic renewal in the account settings for your Apple ID at any time. Any used portion of a free trial period will be forfeited when subscribing to a non-trial plan. Please feel free to contact me if you have any questions: Olivier@oworld.co. Terms of service: https://termsfeed.com/terms-service/5c8b6678a74ea05ab5f671329b35ddc1 Privacy policy: https://www.iubenda.com/privacy-policy/25720446 Keep in mind that this application is constantly evolving. Got an idea for improvement? Can’t find a category? Please, send me an email to olivier@oworld.fr

Screenshots

Currency4 screens
Unit Converter4 screens

Verdict

The call

The clearest difference is review sentiment: Currency at 80% against Unit Converter's 57%. Currency also leads on rating (4.8 vs 4.6) and chart position (#87 vs unranked). Unit Converter's advantage is update cadence (weekly vs monthly). On price, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Currency sells 3 in-app purchases, starting at $19.99 per year and Unit Converter sells 12 in-app purchases, starting at $2.49 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Currency holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: Currency has 78K ratings behind it against 14K, so its average is the more settled of the two. Written reviews point the same way: 80% of Currency's written reviews are positive against 57% of Unit Converter's.

UpkeepUpdate frequency

Currency ships an update monthly, Unit Converter weekly. Both last shipped on September 24, 2026.

Scorecard6 real differences · 5 level
Currency versus Unit Converter: the parameters behind the verdict, then further details
ParameterCurrencyUnit Converter
PriceFreeFree
Rating4.8 (78K ratings) — better4.6 (14K ratings)
Positive reviews80.2% of reviews — better56.6% of reviews
Number of ratings78K — better14K
Update frequencyMonthlyWeekly — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#87 — better—
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, Apple Watch
Requires iOS14.0 — better16.0
Further details — not scored
Size65 MB69 MB
Age rating4+4+
DeveloperJeffrey GrossmanoWorld Software

Customer experience

Currency

All ratings78,224 ratings
Positive96.8%
Neutral1.7%
Negative1.5%
Written reviews1,483 reviews
Positive80.2%
Neutral5.5%
Negative14.2%

Unit Converter

All ratings13,579 ratings
Positive90.0%
Neutral4.0%
Negative6.0%
Written reviews555 reviews
Positive56.6%
Neutral5.9%
Negative37.5%

User reviews

Currency

From 78K App Store ratings

What we love

  • 💡 Offline currency conversion
  • 🚀 Fast and responsive
  • 👍 Easy to customize currency list
  • 👍 Useful for frequent travelers
  • 👍 Accurate and up-to-date exchange rates

Room to improve

  • 🐛 Occasional app freezes or crashes
  • 🐛 Saved currencies reset after updates
  • 💰 Subscription model for premium features
  • 🔍 Inaccurate or misleading exchange rates

Unit Converter

From 14K App Store ratings

What we love

  • 🚀 Easy to use
  • 🚀 Comprehensive unit conversions
  • 👍 Helpful app
  • 👍 Practical for engineering and mechanics
  • 👍 Intuitive interface

Room to improve

  • 🔍 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

Bugs and requests

Currency

Reported bugs

3 issues
  • App freezes when opening
  • Currencies reset to default after updates
  • Widget display issues

Requested features

4 requests
  • Historical currency rate trends
  • Ability to manually input exchange rates
  • Improved Apple Watch integration
  • Dark mode option

Unit Converter

Reported bugs

3 issues
  • Conversion calculations are sometimes inaccurate
  • Inability to enter decimal values in some conversions
  • Compatibility issues with newer devices

Requested features

4 requests
  • Dark mode option
  • Favorites/frequently used units
  • Improved ad-supported free version
  • More customization options

In-app purchases

3 purchases

Currency

Subscriptions1
  • Currency+7 Days trial$19.991 Year
One-time2
  • Currency ProFree
  • Currency Pro$19.99
12 purchases

Unit Converter

Subscriptions5
  • Premium 1 month$2.491 Month
  • Unit Converter Premium - 1y$8.991 Year
  • Get premium7 Days trial$14.991 Year
Show 2 more
  • Premium 1 year7 Days trial$14.991 Year
  • Conversion Calculator Pro - 1y7 Days trial$19.991 Year
One-time7
  • Conversion clothing sizes 1y$0.99
  • Conversion liquids/volumes 1y$0.99
  • Remove Ads 1y$0.99
Show 4 more
  • Conversion angles, forces 1y$1.99
  • Conversion of shoe sizes 1y$1.99
  • Currency Converter 1y$1.99
  • Convert all units + No ads$29.99

Questions

Is Currency free?
Currency is free to download, with in-app purchases available.
Is Unit Converter free?
Unit Converter is free to download, with in-app purchases available.
Which has better reviews, Currency or Unit Converter?
Currency is rated higher. Currency averages 4.8 out of 5 from 78K ratings, while Unit Converter averages 4.6 from 14K ratings.
Do Currency or Unit Converter have ads?
Both Currency and Unit Converter show ads.
Which is updated more often, Currency or Unit Converter?
Currency ships an update monthly, and Unit Converter weekly. Most recently, Currency was updated on September 24, 2026 and Unit Converter on September 24, 2026.

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