# Calculator - Unit Converter

> Standard and scientific calculator with integrated unit conversion for various measurements. (iPhone/iPad app by TOWER OF HANOI SOFTWARE COMPANY LIMITED.)

- Source: https://appshunter.io/ios/app/calculator-unit-converter/id1354901841 (this page in markdown: same URL + `.md`)
- Developer: [TOWER OF HANOI SOFTWARE COMPANY LIMITED](https://appshunter.io/developer/1125320041)
- Category: Utilities, Productivity
- Price: Free
- Rating: 4.60/5 from 387 App Store ratings · 76 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 40 MB
- Languages: American English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France), German (Germany) and 23 more
- Released: 2018-03-16
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/calculator-unit-converter/id1354901841/reviews.md

## What is Calculator?

Calculator is a standard and scientific calculator application, perform calculations from basic to advanced. The application also incorporates unit converter: Deg, Rad, Grad. This is a math calculation application simple and useful for everyone. 

The Calculator app helps you calculate the calculations from basic to advanced. Quickly perform simple mathematical operations such as plus, subtraction, multiplication, division, ... Accurately calculates complex calculations that contain exponentiation functions, logarithms, trigonometric functions, integrals,...
In particular, the Calculator app integrates measurement conversion functions such as length, speed, weight, space, temperature, etc. Unit converter allows you to easily switch units with just a few click.
Calculator - Unit Converter performs complex calculations and unit conversions as specialized calculators used in mathematics.
Features:
- Fast, accurate calculations from simple to complex.
- Simple calculation:  plus, minus, multiplication, division, percent
- Complex calculations: decimal, power, logarithm, sine, cosine, tg, cosh, ...
- Functions (exponential functions, logarithms, trigonometric functions)
- Integral
- Estimation of factorial
- Linear equations, quadratic equations, polynomial equations.
- Matrices (matrix multiplications / matrixes with numbers, inverse matrix definitions)
- Includes Unit Converter: deg, rad, grad
- Convert units of measurement: length, speed, weight, space, temperature.
- Length converter: convert mm to cm (dm, m, km) 
- Speed converter: convert m/s to km/h (mph, f/s) 
- Temperature converter: convert oC to oF (K) 
- Weight converter: convert g to kg (t, mg, Ib) and vice versa
- Simple design, easy to use, nice graphics
- Download the free Calculator app
- No internet connection required
- Multilingual application.
- Compatible with all smart phones
Calculator - Unit Converter is the best calculator application for your device. Download Calculator app on your phone, all the calculations upwards extremely simple with you, convert units of measurement easily and it is completely free.

## Key features

- Basic and advanced calculations
- Scientific functions (log, trig, integrals)
- Unit converter (length, speed, temp, weight)
- Equation solving (linear, quadratic, polynomial)
- Matrix operations
- Offline functionality

## What do users think of Calculator?

Overall sentiment: positive

**Pros**

- 👍 Easy to use
- 🚀 Efficient
- 💡 Useful features (text scanning, speech)
- 🔒 No ads

**Cons**

- 🐛 Occasional bugs or crashes
- 🔋 Annoying review prompts

**Commonly reported bugs**

- Doesn't rotate on iPad Pro
- Displays incorrect calculation results

**Most requested features**

- Dark mode option
- Landscape mode support
- More customization options

## Recent user reviews (10 of 76)

All indexed reviews: https://appshunter.io/ios/app/calculator-unit-converter/id1354901841/reviews.md

### 5/5 — Spitze

*2025-02-11, version 1.0*

Prima

### 5/5 — 👍

*2025-01-28, version 1.0*

👍

### 5/5 — Ottima

*2024-10-14, version 1.0*

Completa!! Consiglio!!!

### 5/5 — Calculadora

*2024-01-26, version 1.0*

Es genial por que me a ayuda a sacar cuenta

### 5/5 — ดี

*2023-09-04, version 1.0*

ดีมากใช้ง่าย

### 5/5 — Easy

*2023-07-02*

Very easy to use

### 5/5 — Es bonita, es completa, muy útil

*2023-05-05, version 1.0*

Exactamente lo que buscaba

### 5/5 — 고

*2023-04-19*

ㆍ

### 5/5 — Уууу

*2023-04-05, version 1.0*

Супер

### 5/5 — Класс

*2023-02-15, version 1.0*

Хороший и бесплатный

## Frequently asked questions about Calculator

### What does the Calculator - Unit Converter app do?

This app functions as both a standard and scientific calculator, capable of performing basic arithmetic as well as advanced mathematical operations like logarithms, trigonometric functions, and integrals. It also includes a comprehensive unit converter for various measurements.

### What types of calculations can this app perform?

The app handles simple calculations such as addition, subtraction, multiplication, and division, along with complex operations including decimals, powers, logarithms, trigonometric functions (sine, cosine, tangent), integrals, and estimations of factorials. It also supports solving linear, quadratic, and polynomial equations, as well as matrix operations.

### What units can be converted with this app?

The unit converter supports conversions for length (e.g., mm to cm), speed (e.g., m/s to km/h), temperature (e.g., °C to °F), and weight (e.g., g to kg). It also includes conversions for degrees, radians, and grads.

### Is this app free to use?

Yes, the Calculator - Unit Converter app is completely free to download and use. It does not require an internet connection and is compatible with all smart phones.

### Who would benefit from using this app?

This app is useful for a wide range of users, including students who need to perform complex math homework, professionals who require quick calculations and conversions in their work, and anyone who needs a reliable and versatile tool for everyday measurement conversions.

## Version history (last 1 release)

### 1.0 — 2018-03-16

This app has been updated by Apple to display the Apple Watch app icon.

## Apps similar to Calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [One Converter: Unit Calculator](https://appshunter.io/ios/app/one-converter-unit-calculator/id1357652887) | 2.0 (7) | Free | Utilities |
| [The Simple Calculator - Solve!](https://appshunter.io/ios/app/the-simple-calculator-solve/id1525169566) | 4.6 (171) | Free | Utilities |
| [Calculator Plus Pro](https://appshunter.io/ios/app/calculator-plus-pro/id1255515239) | 5.0 (28) | Free | Utilities |
| [Calculator You Like](https://appshunter.io/ios/app/calculator-you-like/id1668596276) | — | Free | Utilities |
| [iColorfulCalculator](https://appshunter.io/ios/app/icolorfulcalculator/id945613076) | 5.0 (2) | Free | Utilities |
| [Calc Pro HD – iPad Calculator](https://appshunter.io/ios/app/calc-pro-hd-ipad-calculator/id457004119) | 4.7 (1,445) | Free | Utilities |

## More apps by TOWER OF HANOI SOFTWARE COMPANY LIMITED

- [ViKey Keyboard - keyboard theme,sticker,emoji,font](https://appshunter.io/ios/app/vikey-keyboard-keyboard-themestickeremojifont/id1133088529)
- [Weather forecast - radar](https://appshunter.io/ios/app/weather-forecast-radar/id1188210550)
- [Ninja fight devil & monster](https://appshunter.io/ios/app/ninja-fight-devil-and-monster/id1195779299)
- [Live wallpapers - wallpaper hd](https://appshunter.io/ios/app/live-wallpapers-wallpaper-hd/id1214757337)
- [Karaoke - Sing karaoke](https://appshunter.io/ios/app/karaoke-sing-karaoke/id1253833251)
- [Basketball Perfect](https://appshunter.io/ios/app/basketball-perfect/id1278217327)

All apps by TOWER OF HANOI SOFTWARE COMPANY LIMITED: https://appshunter.io/developer/1125320041

---

*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 2026-06-10.*