Convert Calc 4+

Calculator & Unit Converter

Cider Software LLC

    • 4.7 • 212 Ratings
    • $2.99



A calculator & unit & currency converter with a super clean interface, standalone calculator, customizable color, and over 500 units in 29 categories (161 currencies). Display only the units and categories you want and put them in any order.

Fast, Easy To Use:

Pick a category, pick a unit, and then enter an amount. All other units are instantly converted to your selected unit as you enter amount.


• Full screen calculator with memory functions quickly accessible from bottom toolbar
• Customizable color
• Customizable units (display only the units & categories you want in whatever order you want)
• In-line calculations while converting (fractions, decimals, add, subtract, multiply, divide).
• Convert multiple units / currencies at once
• Both unit names and symbols shown.
• Results with up to 12 significant digits.
• Automatic formatting of decimal and thousands separators according to your Region.
• Automatic formatting of extremely large or small numbers with scientific E notation.


- Font Size
- Sound
- Color Theme
- Minimum Decimal Digits (0-12)
- Maximum Decimal Digits (0-12)
- Show Thousands Separators
- E Notation (Off, Auto, Scientific, Engineering)
- Equals Repeat
- Replace ÷ Button With /
- Replace E Button With Hidden, EE, 00, 000
- Show Memory Buttons
- Memory Store (Result, Last Input Number)
- Currency Updates
- Symbol First
- In-Line Definitions
- UK Spelling

501 Units In 29 Categories:

• Acceleration
• Angle
• Area
• Blood Cholesterol
• Blood Glucose
• Capacitance
• Currency
• Data
• Density
• Dynamic Viscosity
• Electric Charge
• Electric Current
• Electric Potential
• Electrical Conductance
• Electrical Resistance
• Energy
• Force
• Frequency
• Fuel Economy
• Length
• Mass
• Power
• Pressure
• Speed
• Temperature
• Time
• Torque
• Volume
• Weight (Mass)

URL Scheme: converterpro://

What’s New

Version 3.8

- Inputting two consecutive operators in the calculator (+, -, ÷, ×) will now automatically replace the previous operator with the new one (can disable with the option "Autocorrect Extra Operators").
- Added a new option for the backspace button (Solid or Arrow).

Ratings and Reviews

4.7 out of 5
212 Ratings

212 Ratings

VDO-Cutter ,

It's used way more than I thought It would be

I have used this app so many times in the last three months it's crazy. I had no idea how much I needed it until I got it - and it's super easy to use. And the currency conversions include probably every currency, including Bitcoin.

EB Hiker ,

Simple and Comprehensive

This app calculates everything easily. Pick the main category, put in the number you want to convert, and the app immediately provides your answer plus the answers for every subcategory in that main category. Elegant and easy

G. Lewis ,

Only the best

Converter Pro is as good as it gets. There are a huge number of categories and selections to choose from. Plus you can customize it to put the items you most frequently use on top for quick access. Without a doubt, this is a must have app.

App Privacy

The developer, Cider Software LLC, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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