---
title: "▸ Calculator + - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "+ 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 s"
---

# ▸ Calculator + — United States
> Scientific Calculator

![▸ Calculator + App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple113/v4/64/43/9d/64439dd7-f497-3b18-09af-849c9e7edf78/AppIcon-0-1x_U007emarketing-0-0-85-220-10.png/434x0w.png)

**Developer:** [PPCLINK Software](https://apptail.io/developer/ppclink-software-aAd)
**Category:** Utilities
**Rating:** 4.7/5 (894 ratings)
**Price:** Free
**Bundle ID:** com.vietlotus.hicalcpro
**Store:** Apple App Store
**Country:** United States
**Version:** 5.3 (released 2019-09-24)
**Original Release:** 2011-10-24
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id473884845)
**AppTail Page:** [https://apptail.io/app/calculator-EqLc/united-states](https://apptail.io/app/calculator-EqLc/united-states)

## ▸ Calculator + Description
+ 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.

## ▸ Calculator + Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/Purple128/v4/56/14/eb/5614ebfa-0a10-277c-42d1-7e23cc58ff78/mzl.hrcedeqf.jpg/640x960.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/Purple128/v4/59/36/83/5936831c-110c-4402-62f8-917c7e039873/mzl.pytczmwg.jpg/640x960.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/Purple128/v4/53/b7/8f/53b78f90-cd9c-df8c-ca89-010f6484fd26/mzl.thlsfali.jpg/640x960.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/Purple118/v4/44/5a/a5/445aa53f-b65f-7fa2-f998-626d4175e309/mzl.xlzfaqfz.jpg/640x960.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/Purple128/v4/67/aa/47/67aa4772-2272-75d5-2f3a-e4891c49b50d/mzl.iodukajt.jpg/960x640.png)

## ▸ Calculator + Rating Breakdown in United States
- 5 stars: 735 (82%)
- 4 stars: 101 (11%)
- 3 stars: 25 (3%)
- 2 stars: 6 (1%)
- 1 stars: 27 (3%)

## ▸ Calculator + Reviews in United States

### ***** "Handy to use application"
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.
-- CC Musician, 2025-01-31

### *---- "Alternate calculators no longer work"
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. 😡
-- Ron995, 2024-12-22

### **--- "Overall Good, but bugs have crept it"
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.
-- Prevents WiFi, 2023-10-30

### **--- "Lỗi phần mềm ios 13"
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
-- akinguyen007, 2023-10-10

### *---- "No longer works"
I loved and used this for YEARS but it has stoooed loading and I can’t even redownload it. Very disappointing 😖
-- Boo07675, 2022-12-18

### *---- "Money totally wasted"
This calculator does not even open properly. Total waste. Apple needs to take it off the site.
-- paul4100, 2022-10-08

### ***** "Doesn’t fit the screen"
I have been using this app for several years. It used to work fine, until when I upgraded to iPhone 12 Pro Max. This calculator doesn’t fit the screen when doing time/date, add/subtraction operations. This operation works fine in all older iPhones. I have never tested it on iPhone 12 Pro. I’m using iOS 14.4.2.
-- Kassa100, 2021-03-29

### ***** "Very useful"
This is a gem of an app. I use the conversion part of it frequently and it covers almost any kind of conversion you can think of.  I got it for the calculator that shows the tape of your entries and still like that feature.
-- C. Fisher, 2020-02-14

### ***-- "Not supported anymore and several bugs introduced."
I have been using this app for the longest due to its many features but since the last update there are a couple of significant bugs (can’t change the tax rate in the top calculator and the calculator doesn’t fit on the screen when doing time/date add and subtract operations). The support page on the web doesn’t send the form and the Feedback section in the app doesn’t allow to send emails.
-- Península , 2019-10-29

### **--- "Currency exchange off"
Currency exchange not working?
-- Planet Houston, 2019-10-22

[View all ▸ Calculator + reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)

## ▸ Calculator + In-App Purchases
| Item | Price |
|------|-------|
| Biorhythm | $0.99 |
| UI Upgrade | $0.99 |
| Periodic Table | $0.99 |
| Formula Toolkit | $0.99 |

## ▸ Calculator + Store Rankings
| Chart | Country | Category | Rank |
|-------|---------|----------|------|
| Top Paid | Greece | Utilities | #66 |
| Top Paid | Thailand | Utilities | #70 |
| Top Paid | Kuwait | Utilities | #74 |
| Top Paid | Egypt | Utilities | #79 |
| Top Paid | Vietnam | Utilities | #80 |
| Top Paid | Colombia | Utilities | #81 |
| Top Paid | Hong Kong SAR China | Utilities | #91 |
| Top Paid | Chile | Utilities | #97 |
| Top Paid | Singapore | Utilities | #102 |
| Top Paid | Ecuador | Utilities | #103 |
| Top Paid | Mexico | Utilities | #107 |
| Top Paid | Peru | Utilities | #108 |
| Top Paid | Portugal | Utilities | #111 |
| Top Paid | Lebanon | Utilities | #114 |
| Top Paid | Argentina | Utilities | #116 |
| Top Paid | Russia | Utilities | #116 |
| Top Paid | Saudi Arabia | Utilities | #119 |
| Top Paid | Austria | Utilities | #119 |
| Top Paid | Poland | Utilities | #120 |
| Top Paid | United Arab Emirates | Utilities | #124 |
| Top Paid | Taiwan | Utilities | #131 |
| Top Paid | Italy | Utilities | #132 |
| Top Paid | South Korea | Utilities | #135 |
| Top Paid | Belarus | Utilities | #140 |
| Top Paid | France | Utilities | #156 |
| Top Paid | Spain | Utilities | #159 |
| Top Paid | Czechia | Utilities | #161 |
| Top Paid | Belgium | Utilities | #169 |
| Top Paid | Sweden | Utilities | #170 |
| Top Paid | Dominican Republic | Utilities | #182 |
| Top Paid | Brazil | Utilities | #189 |
| Top Paid | Kazakhstan | Utilities | #197 |
| Top Paid | Switzerland | Utilities | #201 |
| Top Paid | Israel | Utilities | #202 |
| Top Paid | Indonesia | Utilities | #205 |
| Top Paid | Hungary | Utilities | #211 |
| Top Paid | Malaysia | Utilities | #213 |
| Top Paid | Romania | Utilities | #236 |
| Top Paid | India | Utilities | #236 |
| Top Paid | Philippines | Utilities | #243 |

## ▸ Calculator + Discovered Keywords
- math
- calculator
- the calculator
- calculator app
- jisuanqi
- the calculator app


## ▸ Calculator + Available In
- [United States](https://apptail.io/app/calculator-EqLc/united-states)
- [Germany](https://apptail.io/app/calculator-EqLc/germany)
- [China](https://apptail.io/app/calculator-EqLc/china)
- [Taiwan](https://apptail.io/app/calculator-EqLc/taiwan)
- [France](https://apptail.io/app/calculator-EqLc/france)
- [Italy](https://apptail.io/app/calculator-EqLc/italy)
- [Hong Kong SAR China](https://apptail.io/app/calculator-EqLc/hong-kong)
- [Thailand](https://apptail.io/app/calculator-EqLc/thailand)
- [Canada](https://apptail.io/app/calculator-EqLc/canada)
- [Japan](https://apptail.io/app/calculator-EqLc/japan)
- [Russia](https://apptail.io/app/calculator-EqLc/russia)
- [United Kingdom](https://apptail.io/app/calculator-EqLc/united-kingdom)
- [South Korea](https://apptail.io/app/calculator-EqLc/south-korea)
- [Mexico](https://apptail.io/app/calculator-EqLc/mexico)
- [Saudi Arabia](https://apptail.io/app/calculator-EqLc/saudi-arabia)
- [Spain](https://apptail.io/app/calculator-EqLc/spain)
- [Switzerland](https://apptail.io/app/calculator-EqLc/switzerland)
- [Brazil](https://apptail.io/app/calculator-EqLc/brazil)
- [Austria](https://apptail.io/app/calculator-EqLc/austria)
- [Vietnam](https://apptail.io/app/calculator-EqLc/vietnam)
- [Belgium](https://apptail.io/app/calculator-EqLc/belgium)
- [Sweden](https://apptail.io/app/calculator-EqLc/sweden)
- [Australia](https://apptail.io/app/calculator-EqLc/australia)
- [Colombia](https://apptail.io/app/calculator-EqLc/colombia)
- [Singapore](https://apptail.io/app/calculator-EqLc/singapore)
- [Greece](https://apptail.io/app/calculator-EqLc/greece)
- [Poland](https://apptail.io/app/calculator-EqLc/poland)
- [Netherlands](https://apptail.io/app/calculator-EqLc/netherlands)
- [Portugal](https://apptail.io/app/calculator-EqLc/portugal)
- [United Arab Emirates](https://apptail.io/app/calculator-EqLc/united-arab-emirates)
- [Türkiye](https://apptail.io/app/calculator-EqLc/turkey)
- [Chile](https://apptail.io/app/calculator-EqLc/chile)
- [India](https://apptail.io/app/calculator-EqLc/india)
- [Malaysia](https://apptail.io/app/calculator-EqLc/malaysia)
- [Argentina](https://apptail.io/app/calculator-EqLc/argentina)
- [Kuwait](https://apptail.io/app/calculator-EqLc/kuwait)
- [Macao SAR China](https://apptail.io/app/calculator-EqLc/macau)
- [Ukraine](https://apptail.io/app/calculator-EqLc/ukraine)
- [Egypt](https://apptail.io/app/calculator-EqLc/egypt)
- [Israel](https://apptail.io/app/calculator-EqLc/israel)
- [Czechia](https://apptail.io/app/calculator-EqLc/czechia)
- [Denmark](https://apptail.io/app/calculator-EqLc/denmark)
- [Philippines](https://apptail.io/app/calculator-EqLc/philippines)
- [New Zealand](https://apptail.io/app/calculator-EqLc/new-zealand)
- [Hungary](https://apptail.io/app/calculator-EqLc/hungary)
- [Romania](https://apptail.io/app/calculator-EqLc/romania)
- [Indonesia](https://apptail.io/app/calculator-EqLc/indonesia)
- [Slovakia](https://apptail.io/app/calculator-EqLc/slovakia)
- [Ireland](https://apptail.io/app/calculator-EqLc/ireland)
- [Norway](https://apptail.io/app/calculator-EqLc/norway)
- [Ecuador](https://apptail.io/app/calculator-EqLc/ecuador)
- [Lebanon](https://apptail.io/app/calculator-EqLc/lebanon)
- [South Africa](https://apptail.io/app/calculator-EqLc/south-africa)
- [Venezuela](https://apptail.io/app/calculator-EqLc/venezuela)
- [Belarus](https://apptail.io/app/calculator-EqLc/belarus)
- [Slovenia](https://apptail.io/app/calculator-EqLc/slovenia)
- [Finland](https://apptail.io/app/calculator-EqLc/finland)
- [Peru](https://apptail.io/app/calculator-EqLc/peru)
- [Bulgaria](https://apptail.io/app/calculator-EqLc/bulgaria)
- [Croatia](https://apptail.io/app/calculator-EqLc/croatia)
- [Panama](https://apptail.io/app/calculator-EqLc/panama)
- [Luxembourg](https://apptail.io/app/calculator-EqLc/luxembourg)
- [Latvia](https://apptail.io/app/calculator-EqLc/latvia)
- [Bahrain](https://apptail.io/app/calculator-EqLc/bahrain)
- [Armenia](https://apptail.io/app/calculator-EqLc/armenia)
- [Cyprus](https://apptail.io/app/calculator-EqLc/cyprus)
- [Sri Lanka](https://apptail.io/app/calculator-EqLc/sri-lanka)
- [Lithuania](https://apptail.io/app/calculator-EqLc/lithuania)
- [Kazakhstan](https://apptail.io/app/calculator-EqLc/kazakhstan)
- [Ghana](https://apptail.io/app/calculator-EqLc/ghana)
- [Estonia](https://apptail.io/app/calculator-EqLc/estonia)
- [Malta](https://apptail.io/app/calculator-EqLc/malta)
- [Madagascar](https://apptail.io/app/calculator-EqLc/madagascar)
- [Nigeria](https://apptail.io/app/calculator-EqLc/nigeria)
- [Nepal](https://apptail.io/app/calculator-EqLc/nepal)
- [Pakistan](https://apptail.io/app/calculator-EqLc/pakistan)
- [Cayman Islands](https://apptail.io/app/calculator-EqLc/cayman-islands)
- [Iceland](https://apptail.io/app/calculator-EqLc/iceland)
- [Algeria](https://apptail.io/app/calculator-EqLc/algeria)
- [Dominican Republic](https://apptail.io/app/calculator-EqLc/dominican-republic)
- [Botswana](https://apptail.io/app/calculator-EqLc/botswana)
- [Brunei](https://apptail.io/app/calculator-EqLc/brunei)
- [North Macedonia](https://apptail.io/app/calculator-EqLc/north-macedonia)
- [Barbados](https://apptail.io/app/calculator-EqLc/barbados)
- [British Virgin Islands](https://apptail.io/app/calculator-EqLc/british-virgin-islands)
- [Azerbaijan](https://apptail.io/app/calculator-EqLc/azerbaijan)
- [Jamaica](https://apptail.io/app/calculator-EqLc/jamaica)

---

## About AppTail

[AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends.

- [Search Apps](https://apptail.io)
- [Top Charts](https://apptail.io/top-iphone-apps)
- [Sign Up for Full Access](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=footer)

*Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*