Comparison

Calvertr Lite vs USA Unit Converter

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

Head to head
About

Calvertr Lite

This free utility app offers a powerful unit converter and calculator with a sleek design. It features thousands of conversions across 34 categories, currency conversion, and a versatile calculator with live math expressions. Personalize your experience with custom themes and save/share your work.

Highlights
  • 34 unit conversion categories
  • 157 world currency support
  • Live math expression calculator
  • Customizable background themes
  • Save and share conversions/calculations
  • Notification center widget calculator
Features
Read full description

A powerful, flexible graphing unit converter and calculator app for FREE! Calvertr Lite offers a wide range of categories and units to convert between with quick, accurate and a sleek polished design. Units Converter: • Easy-to-use interface • 34 ready to go categories with thousands of unit conversions • Support of 157 world currencies * • Simply add units to your favorite list and access directly from home screen • Ability to search units and categories • Add personal notes with each saved conversions and share it with your friends through Email or Airdrop or easily print it • Choose your preferred app background from our 9 gorgeous color themes * Versatile calculator app: • Simple and elegant user interface with gorgeous background • Create live math expression • Automatically save your complete expression for future use • Use backspace anytime to correct a simple mistake, instead of starting over • Tap on math expression to edit and add your notation to each number • Share complete calculation with your friends through Email or Airdrop or Print it • Optimized to be faster and easy to use calculator Widget Notifications Center : The most innovative calculator widget where you can make your mathematics calculations at your notification center as Widget, exclusively designed for iOS 8 Unit Categories: Acceleration, Angle, Area, Astronomical, Business Days, Calendar Days, Capacitance, Clothing, Cooking, Currency, Data, Density, Electric Current, Energy, Force, Frequency, Fuel Consumption, Length, Light, Mass, Mortgage Payment, Percentage, Power, Pressure, Radioactivity, ROI, Sound, Speed, Split Check, Temperature, Time, Tip Calculator, Torque, Viscosity and Volume. * In-app purchase required Calvertr is the perfect unit converter and calculator app where you will have access to convert units and calculations within seconds! Come and download this unique, one-of-a-kind application. We'd love to hear your comments or suggestions.

About

USA Unit Converter

Features
Read full description

Confused about measuring units in American videos? Traveling to Europe from the U.S.? USA Unit Converter is the best choice! The most convenient and quick way to convert from Imperial units to International system and vice versa. Create and customize widget for easy access to the most frequently used units. Why USA Unit Converter? – Speed. You don't need to waste time searching through the categories. You have access to all the units right after opening the app – Widget. Memorize units with our widgets. You can customize count of rows in a widget and frequency of unit updates – No limits. Enjoy all of the features for free with NO ADS

Screenshots

Calvertr Lite4 screens
USA Unit Converter4 screens

Verdict

The call

The clearest difference is in-app purchases: USA Unit Converter at none against Calvertr Lite's 3. Calvertr Lite's advantage is update cadence (every 6 months vs every 14 months) and iOS requirement (8.0 vs 17.0). On price, ads and device support 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. Calvertr Lite sells 3 one-off in-app purchases. USA Unit Converter asks for nothing beyond the download.

UpkeepUpdate frequency

Calvertr Lite ships an update every 6 months, USA Unit Converter every 14 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard3 real differences · 7 level
Calvertr Lite versus USA Unit Converter: the parameters behind the verdict, then further details
ParameterCalvertr LiteUSA Unit Converter
PriceFreeFree
Rating4.3 (10 ratings) — better—
Positive reviews60.0% of reviews—
Number of ratings10 — better—
Update frequencyEvery 6 months — betterEvery 14 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS8.0 — better17.0
Further details — not scored
Size26 MB2 MB
Age rating4+4+
DeveloperIntuz, Inc.Andrey Seleznev

In-app purchases

3 purchases

Calvertr Lite

One-time3
  • Remove Ads$0.99
  • Unlock All Themes$0.99
  • Currency Conversion$0.99
None

USA Unit Converter

No in-app purchases

Questions

Is Calvertr Lite free?
Calvertr Lite is free to download, with in-app purchases available.
Is USA Unit Converter free?
USA Unit Converter is free to download, with no in-app purchases.
Do Calvertr Lite or USA Unit Converter have ads?
Neither Calvertr Lite nor USA Unit Converter shows ads.
Which is updated more often, Calvertr Lite or USA Unit Converter?
Calvertr Lite ships an update every 6 months, and USA Unit Converter every 14 months. Most recently, Calvertr Lite was updated on November 1, 2026 and USA Unit Converter on November 3, 2026.

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