# ▸ Calculator + — Scientific Calculator

> A versatile calculator app with 12 specialized tools and over 800 formulas. (iPhone/iPad app by PPCLINK Software.)

- Source: https://appshunter.io/ios/app/calculator-plus/id473884845 (this page in markdown: same URL + `.md`)
- Developer: [PPCLINK Software](https://appshunter.io/developer/833424538)
- Category: Utilities, Productivity
- Price: $1.99 with in-app purchases
- Rating: 4.70/5 from 893 App Store ratings · 257 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 44 MB
- Languages: American English
- Released: 2011-10-24
- Data updated: 2026-08-30
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/calculator-plus/id473884845/reviews.md

## What is ▸ Calculator +?

+ 800+ formulas in Formula Toolkit In-App 
+ OVER 1 MILLION DOWNLOADS WORLDWIDE
+ Award Winning Calculator Since 2007

HiCalc Pro is an ultimate calculator and will make all your calculations become simpler than ever with 12 calculators: Basic, Scientific, Currency Converter, Unit Converter, Finance, Date - Time, Constants, Equation Solver, Statistics, Base conversion, Graph & Tip calculator.

► Noteworthy
• Three calculating modes: STANDARD, STRING and RPN
• Precision to 31 digits
• BIG CALC in Portrait mode.
• Comprehensive Date & Time calculator
• Unit Converter contains 3,300 units in 113 categories
• Currency converter with daily online update for 152 currencies
• Extended Memory and Expression History supports 
• Intuitive interface
• Export & send out expressions/history

► Features:
• Multi-line LED with smart input for entering complicated expressions
• Show expression as normal writing mode @ very useful for students
• Advanced RPN mode with Stack viewer and functions: DROP, SWAP, ROLL, DEPTH, PICK, OVER, KEEP, LAST, CLEAR
• Sending data from Ext-Memory & History list
• Support 5 languages (English, French, German, Chinese & Vietnamese)

► Scientific calculator: 
• Basic fx: sin, cos, tan, sin-1, cos-1, tan-1, sinh, cosh, tanh, log, ln, sinh-1, cosh-1, tanh-1 …
• Advanced fx: Random, nPr, nCr, Differential function, Evaluation function, Integration function, Root-Finder and Product function, Greatest Common Divisor, Least Common Multiple, Fibonacci function …
• Complex numbers in STRING mode

► Unit Converter: a powerful and easy-to-use tool for converting over 3,300 units in 113 categories.
• Special categories: Women and Girl's Clothing, Cooking, Electric Field, Density Traditional, Typography, UHF channel and frequency chart, Fuel Consumption …
• Full text search for categories and units
• Favorite & Recently used units
• Update over the air

► Statistics calculator
• 15 common functions:  Σ(x), mean of X, AVD, SSD, SDV, C(n, k), Min, Max, GM...
• 6 probability distribution functions: Binomial, Gamma, Gaussian, Geometric, Poisson, Rayleigh
• Smart data input: data import from clipboard supported

► Graphing Calculator
• Up to three graphs
• Coordinate system movable
• Zoom in/out

► Equation solver
• Polynomial Equations (1st-4th)
• N-simultaneous equations

► Base conversion
• Full-featured base conversion

► Date & Time calculator
• Date / Time difference:  calculate duration between two dates.
• Add/ Subtract: Add or subtract days, months and years of a given date to get a new date.
• Events Countdown/up: Shows Time Remaining and Elapsed Time

► World Clock
• Show date & time of any city in the World
• Have 6 cool skins

► Finance calculator 
• Time Value of Money (NPER, RATE, PV, FV, PMT)
• Mortgage & Loan Calculator
• Finance functions: SLN, SYD, DB, NPV, IRR, NPER, RATE, PV, FV, PMT.

► Constants Library:
• 1500 constants from Mathematics, Physics, Solar System and Element e.g: Avogadro number, Gravitational const, Stefan-Boltzmann Const, Speed of Light.

## Key features

- 12 specialized calculators
- Over 800 formulas
- Scientific, RPN, and String modes
- Unit and currency conversion
- Finance and date/time calculations
- Equation solver and graphing
- History and expression export

## Pricing and in-app purchases

Base price: $1.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Formula Toolkit | $0.99 | one-time |
| Periodic Table | $0.99 | one-time |
| UI Upgrade | $0.99 | one-time |
| Biorhythm | $0.99 | one-time |


## What do users think of ▸ Calculator +?

Overall sentiment: negative

**Pros**

- 👍 Handy to use application
- 🔢 Great calculator
- 📊 Excellent for engineering & other use
- 🔢 Very useful
- 🔢 Excellent interface
- 🔢 Fully featured

**Cons**

- 🐛 Date function does not fit iPhone screen
- 🐛 Alternate calculators no longer work
- 🐛 Good calculator but not all function work
- 🐛 Overall Good, but bugs have crept it
- 🐛 Needs an update for new phones
- 🐛 No longer works
- 🐛 Money totally wasted
- 🐛 Used to be amazing. Now all it does is crash
- 🐛 Doesn't fit the screen
- 🐛 Annoying pop up!
- 🐛 It now lags

**Commonly reported bugs**

- Date/Time screen cutoff at bottom and missing keyboard icon
- Currency exchange not working
- Periodic Taple option of HiCalcac pro is not compatible eith iOs 10
- Crashes in iOS 10
- Gig to meg conversion is incorrect

**Most requested features**

- Dark mode option
- Advanced analytics dashboard
- Landscape mode support
- Equation solver for non-polynomials
- Auto-display of graph coordinates

## Recent user reviews (10 of 257)

All indexed reviews: https://appshunter.io/ios/app/calculator-plus/id473884845/reviews.md

### 4/5 — Its also available on ipad! Great work!

*2026-06-01, version 5.3*

Congratulations! give yourself a stamp! but wait... its missing trigonometry... yeah, TRIGONOMETRY IS MISSING!!!

### 5/5 — Super calculatrice

*2026-05-19*

Plein de fonction et en plus la récupération de résultat de calcul pour les intégrer à de nouveau calcul super bien.

### 1/5 — Date function does not fit iPhone screen

*2026-01-23, version 5.3*

I have been using this app for years. It was the best unit conversion app because it provides all kinds of unit conversion including the date function in that you can add and subtract from any date, or find the difference between two dates.  Unfortunately since 2023, the calculator doesn't fit the screen when doing time/date, add/subtraction operations. I have submitted two feedbacks to the developer without seeing any bug fix on this issue. I am using iPhone 17 with iOS 26.2

### 5/5 — Handy to use application

*2025-01-31, version 5.3*

I use this application every day to convert temperatures between Fahrenheit and Celsius, and I frequently use it to calculate the time between dates over long periods, especially how it relates to setting target dates. I love how easy it is to use. I also use it to do a lot of conversion of area and volume, for example, converting square miles into acres.

### 1/5 — Alternate calculators no longer work

*2024-12-22, version 5.3*

Suddenly if I try to scroll to any calc beyond basic or scientific (unit converter, for example) the app crashes and closes down.
This has been my go to calc since it came out. Now it’s no better than the lame calculator that comes with the iOS. 😡

### 3/5 — Good calculator but not all function work

*2024-11-05, version 5.3*

It is a nice calculator, but the unit conversion part of the app on iPhone simply crashes the app as soon as it is selected.  I informed the developer a long time ago, but the bug hasn’t been resolved.  Currency converter also doesn’t use up-date data.

### 5/5 — 哈哈哈哈哈哈哈

*2023-11-25*

突突突

### 2/5 — Overall Good, but bugs have crept it

*2023-10-30, version 5.3*

I used to love this app, and paid for the “pro” version, but over the last few iOS updates the unit conversion feature causes the calculator to crash. 
It is still the best calculator I’ve seen that uses RPN (for us HP die-hards) but disappointed that the unit conversions no longer works.

### 5/5 — Лучший

*2023-10-29*

Пользуюсь приложением практически с самого первого iPhone 3G, раньше название только было другое. В 10 раз удобней обычного калькулятора

### 2/5 — Lỗi phần mềm ios 13

*2023-10-10, version 5.3*

Bố làm ơn cập nhật lại cái phần mềm đi bố. Iphone x nâng cấp lẻn IOS 13 mở phần mềm lên số nó to gần bằng màn hình thì sử dụng thế nào? Lỗi trên ios 13. Cập nhật gấp

## Frequently asked questions about ▸ Calculator +

### What does this calculator app do?

This app provides a powerful and versatile calculator with 12 different specialized tools. It includes basic, scientific, currency conversion, unit conversion, finance, date-time calculations, equation solving, statistics, base conversion, graphing, and a tip calculator. It also offers over 800 formulas within its Formula Toolkit.

### What are the key features of this calculator?

Key features include multiple calculating modes (Standard, String, RPN), precision up to 31 digits, a comprehensive unit converter with over 3,300 units, a currency converter with daily updates, advanced scientific functions, an equation solver for polynomials and simultaneous equations, and a graphing calculator for up to three graphs.

### Is this app free to use?

The app is free to download and use, but it offers in-app purchases. This means that while the core functionality is available for free, certain advanced features or content might require a purchase to unlock.

### What kind of calculations can I perform with the scientific calculator?

The scientific calculator supports a wide range of functions including trigonometric (sin, cos, tan, and their inverses), hyperbolic (sinh, cosh, tanh, and their inverses), logarithmic (log, ln), and advanced functions like nPr, nCr, differential and integration functions, root-finder, product function, GCD, LCM, and Fibonacci. It also handles complex numbers in STRING mode.

### Who would benefit from using this app?

This app is ideal for students studying math, science, or engineering, as well as professionals who require precise calculations for finance, engineering, or data analysis. Its extensive features make it suitable for anyone needing more than a basic calculator.

## Version history (last 5 releases)

### 5.3 — 2019-09-24

- Fix bugs on iPhone X and iOS 13

### 5.2 — 2016-10-21

- Add some new Unit Converter 
- Support Russian  language
- Fixed some minor bugs

### 5.1 — 2016-10-05

- Fixed bug Currency Converter
- Fixed some minor bug

### 5.0 — 2016-09-30

- Support iOS 10
- Fixed some small bugs

### 4.9 — 2013-05-23

- Fix some bugs in RPN, constant, periodic table mode

## Apps similar to ▸ Calculator +

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Calculator₊](https://appshunter.io/ios/app/calculator/id398129933) | 4.7 (1,726,794) | Free | Utilities |
| [Calculator #](https://appshunter.io/ios/app/calculator/id458535080) | 4.6 (35,876) | Free | Utilities |
| [Calculator +](https://appshunter.io/ios/app/calculator-plus/id351815470) | 4.6 (10,020) | Free | Utilities |
| [The Best Calculator - Calc Pro](https://appshunter.io/ios/app/the-best-calculator-calc-pro/id451544502) | 4.6 (4,710) | Free | Utilities |
| [Basic Calculator: Classic Calc](https://appshunter.io/ios/app/basic-calculator-classic-calc/id430271248) | 4.8 (3,192) | Free | Utilities |
| [Calculator⁼](https://appshunter.io/ios/app/calculator/id487127942) | 4.6 (358,262) | Free | Utilities |

## More apps by PPCLINK Software

- [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 PPCLINK Software: https://appshunter.io/developer/833424538

## Related topics

[ocasio](https://appshunter.io/ios/topics/ocasio) · [matriz produtividade](https://appshunter.io/ios/topics/matriz-produtividade) · [finance calculator plus](https://appshunter.io/ios/topics/finance-calculator-plus) · [r47 rpn calculator](https://appshunter.io/ios/topics/r47-rpn-calculator)

---

*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 2026-08-30.*