Comparison

ConvertCalc vs Starling Calculator

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

Head to head
About

ConvertCalc

This app combines a powerful calculator with an advanced unit converter, offering over 200 units across 19 categories. It allows for unified calculations and conversions in one step, with features like live currency exchange and date conversions. An optional pro version unlocks advanced customization and organizational tools.

Highlights
  • Unified calculation and conversion workflow
  • Over 200 units across 19 categories
  • Live currency conversion
  • Multiple calendar system conversions
  • Age calculator
  • Customizable themes and layouts
  • Offline functionality (excluding live currency)
Features
Read full description

ConvertCalc – Pro Calculator & Unit Converter Fast. Private. Ad-free. Over 200+ units. The only calculator you’ll ever need. ConvertCalc combines a powerful everyday calculator with an advanced unit converter in one clean, distraction-free app. Built for students, travelers, freelancers, and professionals who need accurate results instantly — without ads or clutter. WHY CONVERTCALC? Unified Workflow Calculate and convert in one step. Enter an equation, get the result, and instantly convert it to any unit. No switching apps. No extra taps. POWERFUL UNIT CONVERSION 19 categories. Hundreds of units. Real-world use cases: Essentials Length, Mass, Volume, Area, Temperature, Time, Speed Travel & Finance Live currency conversion (30+ major currencies) Shoe size conversion (Men, Women, Kids) Science & Engineering Force, Energy, Power, Pressure, Torque, Fuel Consumption Technology Data storage (Bit to Yottabyte) Data transfer speeds Calendar Systems Convert dates across: Gregorian, Japanese, Buddhist, Islamic, Hebrew, Chinese Lunar, Indian, Persian, ISO 8601, ROC Age Finder Instant age calculator and estimator GO PRO – TOTAL CONTROL Unlock the full power of ConvertCalc Pro: Favorite Pairs Save common conversions for quick access (USD to EUR, Meters to Feet, Celsius to Fahrenheit) One-Handed Layouts Compact, Right-handed and Left-handed modes Unlimited Named History Save, label, and organize your calculations Saved Shoe Profiles Store sizes for family and friends Full Organization Reorder currencies and units your way Advanced Rounding Control decimals and precision Premium Customization 50+ themes and custom colors Design your perfect calculator 100% Ad-Free Forever BUILT FOR DAILY USE Works offline (except live currency updates) Smart history tracking No tracking, no ads Clean, modern interface Download ConvertCalc One app. Endless calculations.

About

Starling Calculator

Features
Read full description

Starling — Speak or Tap. Your Choice. A smarter way to calculate. Starling is a voice-powered calculator that understands natural language in English and Chinese — while still giving you the familiar keypad when you need it. Speak your calculations Just say it naturally: • “twenty times three plus fifteen equals” • “一百二十三除以三再加五等于” • “add ten more equals” No rigid format. Starling understands you. Or just tap Prefer a traditional calculator? Starling also includes a clean, responsive keypad — so you can switch between voice and touch anytime. Fast & accurate Get instant results with high accuracy using on-device speech recognition. Bilingual support Seamlessly supports both English and Chinese. Personalize your style Choose from multiple themes to match your taste — from minimal to vibrant. Designed for real life Perfect when: • your hands are busy • typing feels slow • you want a faster, more natural way to calculate Make calculations as easy as speaking — or tapping. Try Starling today. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://starling-app.github.io/Starling/privacy.html

Screenshots

ConvertCalc4 screens
Starling Calculator4 screens

Verdict

The call

The clearest difference is ads: Starling Calculator at none against ConvertCalc's shown. On price, in-app purchases, device support and iOS requirement 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. ConvertCalc sells 1 one-off in-app purchase and Starling Calculator sells 3 in-app purchases, starting at $4.99 per year. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference · 9 level
ConvertCalc versus Starling Calculator: the parameters behind the verdict, then further details
ParameterConvertCalcStarling Calculator
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 8 days—
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.0 — better18.0
Further details — not scored
Size28 MB16 MB
Age rating4+4+
DeveloperMichael Riehl文之 虞

In-app purchases

1 purchases

ConvertCalc

One-time1
  • ConvertCalc Pro$8.99
3 purchases

Starling Calculator

Subscriptions1
  • Starling Pro$4.991 Year
One-time2
  • Starling Pro$2.99
  • Starling Pro$6.99

Questions

Is ConvertCalc free?
ConvertCalc is free to download, with in-app purchases available.
Is Starling Calculator free?
Starling Calculator is free to download, with in-app purchases available.
Do ConvertCalc or Starling Calculator have ads?
ConvertCalc shows ads; Starling Calculator does not.

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