# Calculator # Converter — Scientific calculator > Advanced scientific calculator with unit conversion and financial tools. (iPhone/iPad app by CAT VIET SOFTWARE DEVELOPMENT & MEDIA JSC.) - Source: https://appshunter.io/ios/app/calculator-converter/id493858733 (this page in markdown: same URL + `.md`) - Developer: [CAT VIET SOFTWARE DEVELOPMENT & MEDIA JSC](https://appshunter.io/developer/833424538) - Category: Utilities, Productivity - Price: Free with in-app purchases - Rating: 4.30/5 from 69 App Store ratings · 163 written reviews indexed - Age rating: 4+ - Requires: iOS 7.0 · 56 MB - Languages: American English - Released: 2012-01-17 - Data updated: 2026-07-05 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/calculator-converter/id493858733/reviews.md ## What is Calculator # Converter? + OVER 1 MILLION DOWNLOADS WORLDWIDE + Award Winning Calculator Since 2007 + 800+ formulas in Formula Toolkit In-App HiCalc - Calculator for iPad will make all your calculations become simpler than ever. ► Scientific calculator: sin, cos, tan, deg/rad/grad, Pi, sin-1, cos-1, tan-1, sinh, cosh, tanh, log, ln, sinh-1, cosh-1, tanh-1, Dec->Deg, Deg->Dec, XY->R, Random, nPr, nCr, Differential function, Evaluation function,... ► Necessary functions for your popular daily calculation: • Currency Converter • Unit Converter • Date - Time • Finance ► Engineering & Finalcial Calculator: • Graph • Statistics • Equation Solver • Finance • Base Conversion ► Noteworthy • RETINA ready! • New! Biorhythm calculator  • Support three calculating modes: STANDARD, STRING and RPN • Support precision to 31 digits • Supports Complex numbers in STRING mode • Powerful scientific calc with advanced fx: Differential, Evaluation, Integration, Product, Root-Finder… • Support Extended Memory for deep calculation • Expression history up to 135 items • Sending data from Ext-Memory & History list • Copy & Paste support • Intuitive interface & No ADs ► Features:
 • Multi-line LED-Calculator • Smart input which allows input of complicated expressions • Show expression as normal writing mode @ very useful for students • Supports both USA and EUROPEAN styles for date and numeric separator • Advanced RPN mode with Stack viewer and functions: DROP, SWAP, ROLL, DEPTH, PICK, OVER, KEEP, LAST, CLEAR ► Tip calculator Easy & funny to use. ► Biorhythm calculator How are you today? How is your health factor this week, next month, next year? Biorhythm calculator will show you health factors as : physical, intellectual, intuitional and also emotional factor. ► Constants Library The Constants Library includes 1500 constants from Mathematics, Physics, Solar System and Element e.g: Avogadro number, Faraday const, Coulomb const, Gravitational const, Stefan-Boltzmann Const, Speed of Light, Euler constant... ## Key features - Scientific calculator functions - Currency and unit converter - Date and time calculations - Financial calculator - Graphing and equation solver - Constants library - RPN mode support ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | "Joyful skins" | $0.99 | one-time | | Daily Calculating | $1.99 | one-time | | Engineering & Financial Calculator | $1.99 | one-time | | Formula Toolkit | $0.99 | one-time | | Periodic Table | $0.99 | one-time | | "Unlock All features" | $2.99 | one-time | ## What do users think of Calculator # Converter? Overall sentiment: positive **Pros** - 👍 No ads - 🚀 Powerful features - 💡 Tip calculator - 🔒 No in-app purchases - 👍 Clean and intuitive interface - 👍 Comprehensive functionality - 👍 Useful extras (skins, history, email) **Cons** - 🐛 Occasional crashes - 🐛 Syntax errors in some functions - 🐛 Issues with decimal character - 🔋 Popup ads after updates - 🔋 Forced to select keyboard each time **Commonly reported bugs** - Syntax errors in some functions - Crashes when trying to delete app - Incompatibility with older iOS versions **Most requested features** - Dark mode option - Ability to annotate saved calculations - Customizable decimal character - Repeated equals function ## Recent user reviews (10 of 163) All indexed reviews: https://appshunter.io/ios/app/calculator-converter/id493858733/reviews.md ### 1/5 — Used to be good now just a PITA *2023-07-11, version 3.0* This used to be a great convenient calculator. Since the upgrade now you have to go into the drop down menu and select “Scientific” before the calculator shows up to be used. What a pain. Definitely not an improvement. ### 4/5 — keyboard *2023-07-05, version 3.0* Would be five star but every time you start app, you have to select a keyboard. Nice screen, no keyboard. Would be so much easier to use if the keyboard stayed. Funny thing though, used to work just fine until the last upgrade. ### 5/5 — Noice *2019-10-18, version 2.9* Nice ### 1/5 — Bad *2018-09-21, version 3.0* Ads ### 5/5 — Very good *2018-08-17, version 2.9* Works great ### 5/5 — Decent! *2018-06-13, version 2.9* Easy to use! ### 5/5 — Patate *2018-05-23, version 2.9* Li ### 4/5 — Good *2018-05-01, version 2.9* Yup pretty good ### 1/5 — Buggy and not supported by the developer *2018-04-07, version 2.9* Hicalc used to be great, and then the developers got distracted with other products and forgot to maintain this app. I’ve complained several times over the past 6 months about a couple of severe bugs (especially with the currency conversion) and they keep telling me to be patient because they’re busy developing other apps. I paid for this one, and there’s no way I’d ever buy any other app from this developer until they fix what’s wrong with this app. ### 2/5 — Great calculator *2018-03-23, version 2.9* Very functional, I've upgraded to the paid version. This calculator stands out for its functionality, ease of use and features. Update: I have an issue, in one of the updates, editing strings changed and I use the calculator in String mode, often editing a string to change sections, when I edit the string and delete a part, it clears the entire string. It has been this way for quit a while, there is a work around however as I need this to work properly I have stopped using this calculator. ## Frequently asked questions about Calculator # Converter ### What does Calculator Converter do? Calculator # Converter is a powerful utility app that functions as a scientific calculator, unit converter, currency converter, and financial calculator. It offers a wide range of mathematical functions, including trigonometric, logarithmic, and hyperbolic operations, along with tools for date and time calculations. ### What are the key features of this calculator app? Key features include a comprehensive scientific calculator with advanced functions, a currency and unit converter, date and time calculations, financial tools, graphing capabilities, an equation solver, and a large constants library. It also supports multiple calculating modes like STANDARD, STRING, and RPN, and offers precision up to 31 digits. ### Is Calculator Converter free to use? The app is available for free download and use, but it offers in-app purchases. This means that while the core functionality is accessible without cost, certain advanced features or additional content might require a purchase. ### What kind of calculations can I perform with this app? You can perform a vast array of calculations, from basic arithmetic to complex scientific computations like sin, cos, tan, logarithms, and differential functions. It also handles currency conversions, unit conversions (e.g., length, weight, volume), date and time differences, and financial calculations such as loan payments and interest. ### Who is the target audience for Calculator Converter? This app is designed for a broad audience, including students who need a reliable calculator for their studies, engineers requiring precise scientific and engineering calculations, financial professionals for complex financial modeling, and anyone who frequently needs to convert units or currencies. ## Version history (last 5 releases) ### 3.0 — 2018-09-15 What's new in version 3.0? - Update currency converter. - Update Periodic Table. - Fix some bugs reported by users for better user experience. - If you want to change the skins, please go to Menu > Setting > Scientific Calculator Skin > Choose the skin you want. You can also go to Optional Upgrade to download free skins. If you have any feedbacks, please do not hesitate to contact us at support@ppclink.com. Thanks so much for choosing our Calculator! ### 2.9 — 2017-06-22 - Improve performance for better user experience. - If you want to change the skins, please go to Menu > Setting > Scientific Calculator Skin > Choose the skin you want. You can also go to Optional Upgrade to download free skins. If you have any feedbacks, please do not hesitate to contact us at support@ppclink.com. Thanks so much for choosing our Calculator! ### 2.8 — 2017-05-24 Thanks for using Calculator of PPCLINK. We hope that you are having great experience with our application. In this new version, we have these following features: - Update new UI design - Fix some bugs and improve app performance. In case you have any feedbacks, please write an email to support@ppclink.com! Thank you so much! ### 2.7 — 2015-05-22 - Fixed some bugs on iPad Air ### 2.6 — 2015-05-10 - Fixed some bugs - Unlock all awesome features for 1 day (Watch Ads - All free) ## Apps similar to Calculator # Converter | App | Rating | Price | Category | | --- | --- | --- | --- | | [ACalc - Scientific Calculator](https://appshunter.io/ios/app/acalc-scientific-calculator/id957798727) | 4.3 (82) | Free | Utilities | | [BIG CALCULATOR.](https://appshunter.io/ios/app/big-calculator/id1114392920) | 4.5 (39) | Free | Utilities | | [Calculator #1 for iPad](https://appshunter.io/ios/app/calculator-1-for-ipad/id1513523193) | 4.3 (57) | Free | Utilities | | [RealCalc: Fun Calculator Skins](https://appshunter.io/ios/app/realcalc-fun-calculator-skins/id427454707) | 3.8 (17) | Free | Utilities | | [Calc Pro HD – iPad Calculator](https://appshunter.io/ios/app/calc-pro-hd-ipad-calculator/id457004119) | 4.7 (1,445) | Free | Utilities | | [Calculator HD for iPad.](https://appshunter.io/ios/app/calculator-hd-for-ipad/id581460240) | 4.3 (41) | Free | Utilities | ## More apps by CAT VIET SOFTWARE DEVELOPMENT & MEDIA JSC - [Dictionary & Thesaurus with Google Translate](https://appshunter.io/ios/app/dictionary-and-thesaurus-with-google-translate/id287573739) - [Chinese Chess Master](https://appshunter.io/ios/app/chinese-chess-master/id316540851) - [English Vietnamese Dictionary - Tu Dien Anh Viet](https://appshunter.io/ios/app/english-vietnamese-dictionary-tu-dien-anh-viet/id318906310) - [Calculator & Unit Converter](https://appshunter.io/ios/app/calculator-and-unit-converter/id442665708) - [Cờ Tướng Viet Nam](https://appshunter.io/ios/app/co-tuong-viet-nam/id448258246) - [Lines 98 HD](https://appshunter.io/ios/app/lines-98-hd/id465891009) All apps by CAT VIET SOFTWARE DEVELOPMENT & MEDIA JSC: https://appshunter.io/developer/833424538 --- *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 2026-07-05.*