Comparison

Calvertr Lite vs ProCalc

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

ProCalc

Read full description

Stylish, Minimal, All-in-One Calculator and Utility Suite • Customize colors for digits, operators, brackets and functions. • Set precision, percentage logic. • Sleek modern light/dark UI. • Scientific and financial tools for everyday use. • Unlock premium themes for a personalized experience. • History and memory. Easily add to history manually or with each press of equal button Everyday Utilities: - Standard Calculator: Quick, reliable calculations - Date Calculator: Track duration and intervals - Unit Converter: Length, weight, temperature and more - Currency Converter: Real-time conversion for global currencies - Fuel Calculator: Manage fuel costs efficiently - Work Shift Calculator: Track hours, breaks, overtime and holiday pay Financial Tools: - Loan Calculator: Plan repayments - Mortgage Calculator: Manage home financing - Retirement Planner: Forecast your future savings - Savings Calculator: Track your growth - Much more... Health and Wellness: - BMI Calculator: Quick health metric insights History and Tracking: Save and review past calculations Premium Features: Unlock additional themes. Download now and simplify your life with a modern, customizable calculator and utility suite!

Screenshots

Calvertr Lite4 screens
ProCalc4 screens

Verdict

The call

The clearest difference is ads: Calvertr Lite at none against ProCalc's shown. Calvertr Lite also leads on iOS requirement (8.0 vs 13.0). ProCalc's advantage is update cadence (monthly vs every 6 months). On price, in-app purchases 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 and ProCalc sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Calvertr Lite ships an update every 6 months, ProCalc monthly. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

Scorecard3 real differences · 7 level
Calvertr Lite versus ProCalc: the parameters behind the verdict, then further details
ParameterCalvertr LiteProCalc
PriceFreeFree
Rating4.3 (10 ratings) — better—
Positive reviews60.0% of reviews—
Number of ratings10 — better—
Update frequencyEvery 6 monthsMonthly — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better13.0
Further details — not scored
Size26 MB34 MB
Age rating4+4+
DeveloperIntuz, Inc.Penquinzoo Limited

In-app purchases

3 purchases

Calvertr Lite

One-time3
  • Remove Ads$0.99
  • Unlock All Themes$0.99
  • Currency Conversion$0.99
4 purchases

ProCalc

One-time4
  • Unlock Flat themes$3.99
  • Graphs and pdf export.$3.99
  • Unlock Neon themes$4.99
Show 1 more
  • All themes$4.99

Questions

Is Calvertr Lite free?
Calvertr Lite is free to download, with in-app purchases available.
Is ProCalc free?
ProCalc is free to download, with in-app purchases available.
Do Calvertr Lite or ProCalc have ads?
ProCalc shows ads; Calvertr Lite does not.
Which is updated more often, Calvertr Lite or ProCalc?
Calvertr Lite ships an update every 6 months, and ProCalc monthly. Most recently, Calvertr Lite was updated on November 1, 2026 and ProCalc on October 30, 2026.

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