Comparison

Unlimited Calculator Pro vs convrt

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

Head to head
About

Unlimited Calculator Pro

This app provides a powerful and accurate calculator capable of handling extremely large numbers and complex equations without errors. It features a clean interface and lightning-fast performance for students, professionals, and math enthusiasts.

Highlights
  • Boundless calculations with large numbers
  • Pinpoint scientific precision
  • Clean and intuitive interface
  • Stunning visual details
  • Lightning-fast performance
Features
Read full description

Unlimited Calculator is the most powerful calculator available on the App Store. Unlike standard calculators limited to 15–16 digits, Unlimited Calculator handles numbers of any size — millions of digits — with perfect precision. Whether you are a student, engineer, researcher, or simply curious about mathematics, Unlimited Calculator gives you tools that go far beyond arithmetic. What makes it unique: Arbitrary-precision arithmetic using BigInteger — no rounding, no overflow, no limits RSA key generation (256 to 2048 bit) with step-by-step explanation Diffie-Hellman key exchange demonstration Collatz conjecture explorer with animated sequences Prime factorization, Euler totient, Miller-Rabin primality test Special sequences: Fibonacci, Catalan, Bell numbers, and factorial with exact BigInteger results Matrix calculator for linear algebra operations Unit and currency converter Function grapher with zoom and pan Finance calculator (compound interest, loan amortization) Scan handwritten or printed expressions using the camera (OCR) Multi-base display: see your result simultaneously in decimal, hexadecimal, binary, and octal Calculation history with tags, star, and CSV/JSON export Home screen widget showing your last calculation Full VoiceOver accessibility support Dark mode, light mode, and custom accent color Complete Italian localization

About

convrt

Features
Read full description

After selecting a category and an associated unit an input value has to be provided. Once input has been provided and the “Convert" button has been clicked, the keyboard will be dismissed, and the conversion results will be listed in a table underneath the input field. The selected category and unit will appear as the button title. Checks will be executed the validate the input provided. An error message will be displayed if invalid input is entered. All categories can deal with decimal input including decimal places. Exceptions are the categories 'Numeral' and 'Data'. These categories don't allow decimal places. For the 'Numeral' category input depends on the selected unit; binary only allows 0 and 1, octal only allows for 0..7, decimal only allows for 0..9 and hexadecimal allows for 0..9 and A..F. The categories Circle, Data and Temperature have an option “Table" in the Unit list. When selected the app will list formulas used to execute the conversions (for Circle and Temperature) and a table with all data storage units and how they relate to each other (for Data). Tables will be listed without the need to provide Input or pressing the Convert button. More detailed Help information is provided on the Help screen in the app. In settings you can set number of decimal places for each of the category's unit conversion results and if you want to use grouping separators. Also you have the option to change the color of the buttons on the main screen.

Screenshots

Unlimited Calculator Pro4 screens
convrt1 screens

Verdict

The call

The clearest difference is ads: convrt at none against Unlimited Calculator Pro's shown. convrt also leads on iOS requirement (15.6 vs 17.6). Unlimited Calculator Pro's advantage is update cadence (every 3 months vs every 25 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Unlimited Calculator Pro ships an update every 3 months, convrt every 25 months. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

Scorecard3 real differences · 7 level
Unlimited Calculator Pro versus convrt: the parameters behind the verdict, then further details
ParameterUnlimited Calculator Proconvrt
PriceFreeFree
Rating1.0 (2 ratings) — better—
Positive reviews40.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 3 months — betterEvery 25 months
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.615.6 — better
Further details — not scored
Size6 MB3 MB
Age rating17+4+
Developerfabrizio chimientiHerbert Jonkman

In-app purchases

None

Unlimited Calculator Pro

No in-app purchases

None

convrt

No in-app purchases

Questions

Is Unlimited Calculator Pro free?
Unlimited Calculator Pro is free to download, with no in-app purchases.
Is convrt free?
convrt is free to download, with no in-app purchases.
Do Unlimited Calculator Pro or convrt have ads?
Unlimited Calculator Pro shows ads; convrt does not.
Which is updated more often, Unlimited Calculator Pro or convrt?
Unlimited Calculator Pro ships an update every 3 months, and convrt every 25 months. Most recently, Unlimited Calculator Pro was updated on November 6, 2026 and convrt on November 7, 2026.

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