# Unlimited Calculator Pro > High-precision calculator for unlimited large numbers and complex equations. (iPhone/iPad app by fabrizio chimienti.) - Source: https://appshunter.io/ios/app/unlimited-calculator-pro/id955328080 (this page in markdown: same URL + `.md`) - Developer: [fabrizio chimienti](https://appshunter.io/developer/955155245) - Category: Utilities, Education - Price: Free - Rating: 1.30/5 from 3 App Store ratings · 5 written reviews indexed - Age rating: 17+ - Requires: iOS 17.6 · 6 MB - Languages: American English - Released: 2015-01-14 - Data updated: 2026-08-17 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/unlimited-calculator-pro/id955328080/reviews.md ## What is Unlimited Calculator Pro? 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 ## Key features - Boundless calculations with large numbers - Pinpoint scientific precision - Clean and intuitive interface - Stunning visual details - Lightning-fast performance ## Recent user reviews (5 of 5) All indexed reviews: https://appshunter.io/ios/app/unlimited-calculator-pro/id955328080/reviews.md ### 2/5 — Unlimited calculator appears limited in big numbers *2022-04-28* I can’t get it calculate beyond 400 thousand digits and it’s perplexing because it says “unlimited” ### 3/5 — How Big the Numbers Can Get n My Mac. *2022-04-25* It says "umlimited" calculator but it doesn't seem to calculate more than about 250 thousand digits on my Mac. Weird. ### 4/5 — Please keep developing this !! *2021-01-10* An excellent start ... Thank You It would be very useful to have the facility to: — paste numbers in from the clipboard — include brackets in the calculation — put numbers into a memory — and all the good things you are already planning ### 1/5 — Very Hard To Read *2019-08-04* This calculator is nearly impossible to read when using very large numerical values because it does NOT display any coma separations for thousands, millions, billions etc. ### 4/5 — Needs more please! *2016-03-18, version 1.2.2* This really has great potential, but there needs to be more functions already!! I love the unlimited digit idea - I use it for a lot. Or at least I try... Anything of scientific notation, etc, I can't do since there's not even an exponential function. I see the plans you have in the description, please get these out ASAP! ## Frequently asked questions about Unlimited Calculator Pro ### What makes Unlimited Calculator Pro different from standard calculators? Unlimited Calculator Pro is designed to handle massively large numbers and complex equations with infinite precision, avoiding the 'Error' messages or loss of accuracy often found in standard calculators. It utilizes a custom-built computational engine for uncompromised results. ### Does Unlimited Calculator Pro have ads? Yes, Unlimited Calculator Pro contains advertisements. As a free utility app, it relies on ads to support its development and maintenance. ### What devices is Unlimited Calculator Pro available on? Unlimited Calculator Pro is available on iPhone and iPad devices. It is optimized for iOS. ### How often is Unlimited Calculator Pro updated? The latest version of Unlimited Calculator Pro is 1.7, last updated on March 30, 2026. While specific update frequency isn't detailed, this indicates ongoing development. ### What is the age rating for Unlimited Calculator Pro? Unlimited Calculator Pro has an age rating of 4+. This suggests it is suitable for general audiences and does not contain mature content. ### Can Unlimited Calculator Pro perform scientific calculations? Yes, Unlimited Calculator Pro offers pinpoint scientific precision, including highly accurate trigonometric functions (sin, cos, tan) and logarithms (ln, log) calculated using advanced mathematical series. ### What is the user sentiment for Unlimited Calculator Pro based on its rating? Unlimited Calculator Pro has a rating of 1.3 stars from 3 ratings. This indicates a generally negative user sentiment based on the limited available feedback. ### Is Unlimited Calculator Pro free to use? Yes, Unlimited Calculator Pro is available for free. However, it does include advertisements. ## Version history (last 5 releases) ### 1.7.4 — 2026-08-13 Version 2.0 is a complete overhaul of Unlimited Calculator. Every part of the app has been rebuilt from the ground up. Critical bug fixes The BigInteger engine that powers every calculation in the app received several critical repairs. A long-standing bug caused the square function to compute a square root instead of a square, producing wrong results in RSA key generation and the math challenge mode. The comparison operators (less than, greater than) were reversed, silently flipping the result of every inequality. A memory leak in the Miller-Rabin primality test has been eliminated. Serialization of large numbers to disk was reading the wrong byte length, which could corrupt saved history entries. All of these issues are now resolved. New features The Explore tab introduces a mathematical fact of the day and a deterministic number of the day, refreshed every 24 hours. The expression undo and redo system uses a ring buffer that stores up to 50 states; shake the device to undo. The adaptive keyboard now shows only the symbols that are valid for the currently selected numeral base, reducing input errors. Results are displayed simultaneously in decimal, hexadecimal, binary, and octal in a dedicated panel. A matrix calculator handles operations on integer and real matrices. A finance calculator covers compound interest and loan amortization. The unit and currency converter supports dozens of categories. The function grapher supports pinch-to-zoom and drag-to-pan. A camera OCR scanner reads handwritten or printed mathematical expressions directly from the viewfinder. A home screen widget shows the last calculation and the first result of the day. The onboarding flow introduces new users to 50-digit arithmetic, the Collatz sequence, and the differences between the free and Pro tiers through three interactive screens. A math challenge mode presents increasingly difficult problems, tracks your streak and personal record, and lets you share your result. The rewarded ad system offers five unlock gates with flexible durations (hours, days, or single use). Pro users bypass all gates permanently. Themes and accessibility Three color schemes are available: system, light, and dark. The accent color can be customized. Every interactive element carries an accessibility label and hint, and important calculation events post VoiceOver announcements. Localization The app is fully localized in Italian, with more than 200 localization keys covering every screen, button, and error message. ### 1.7.3 — 2026-06-11 - Live Currency Conversion: The unit converter now fetches real-time exchange rates automatically. Your last updated rates are cached on your device, allowing you to convert currencies offline without interruption. - Native Unary Minus & Implicit Multiplication: We have upgraded the mathematical engine! You can now naturally type negative numbers (like -5 or sin(-x)) and implicit equations (like 2(x+3)) without having to manually insert extra operators. - Advanced Graphing & Presets: Plot up to 3 mathematical functions simultaneously in distinct colors. Easily load common formulas (trigonometric, polynomials, or advanced functions like Sigmoid) from the new presets menu, and drag your finger to interactively snap to coordinates on the chart. - History Search, Notes & Export: Take complete control of your history. You can now search through past calculations, add custom notes or labels to your items, and easily export your history as a formatted text file using the system share sheet. ### 1.7.2 — 2026-06-10 Improved Cursor Precision: Fixed a bug where the cursor would misalign or display incorrectly when long numbers wrapped across multiple lines. Smoother Editing Experience: Moving the cursor through numbers is now perfectly stable. The annoying text-shifting and wiggling effect when navigating left or right has been eliminated. Under the Hood: Minor optimizations and compliance updates for a smoother App Store experience. ### 1.7 — 2026-03-30 Pinpoint Precision & A Cleaner Look! In this update, we’ve been working hard behind the scenes to make Unlimited Calculator more powerful and elegant than ever. Here’s what’s new: We’ve completely rebuilt our calculation engine for trigonometric functions (Sin, Cos, Tan) and logarithms. Your scientific calculations are now vastly more precise and reliable, flawlessy handling even the most complex edge cases. Cleaner, Focused Interface: We listened to your feedback! We’ve streamlined the calculator by tucking away rarely used advanced functions. You now get a cleaner, modern interface focused entirely on your core workflow. Visual Polish & Bug Fixes: Fixed minor visual glitches (including the clipping issue in the hourglass animation) and perfectly adjusted the app icon scaling. Keep calculating without limits! If you enjoy the app, please leave us a review. ### 1.6 — 2021-08-30 - improve UI experience - add exp and sqrt function - fix bugs ## Apps similar to Unlimited Calculator Pro | App | Rating | Price | Category | | --- | --- | --- | --- | | [TLF Events Tamil](https://appshunter.io/ios/app/tlf-events-tamil/id1481109080) | — | Free | Utilities | | [JEDA Live 職達](https://appshunter.io/ios/app/jeda-live/id1476523220) | — | Free | Utilities | | [SSI Steel Design](https://appshunter.io/ios/app/ssi-steel-design/id1474838160) | 3.0 (1) | Free | Utilities | | [レコーダー - スピークバディ パーソナルコーチング](https://appshunter.io/ios/app/id1469874020) | — | Free | Utilities | | [小灵龙App](https://appshunter.io/ios/app/app/id1221738240) | 1.0 (12) | Free | Utilities | | [Rule of Three Calculator](https://appshunter.io/ios/app/rule-of-three-calculator/id1185318300) | 2.3 (4) | Free | Utilities | ## More apps by fabrizio chimienti - [Costituzione - ProjectDuraLex](https://appshunter.io/ios/app/costituzione-projectduralex/id1048380972) - [Codice Civile - ProjectDuraLex](https://appshunter.io/ios/app/codice-civile-projectduralex/id1055093081) - [Codice Penale - ProjectDuraLex](https://appshunter.io/ios/app/codice-penale-projectduralex/id1056258246) - [ProjectDuraLex](https://appshunter.io/ios/app/projectduralex/id1056926368) - [ManageQrCode](https://appshunter.io/ios/app/manageqrcode/id1460152161) All apps by fabrizio chimienti: https://appshunter.io/developer/955155245 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-17.*