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
180 Ratings

180 Ratings

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.

oldslojoe ,

Now I know

What was at one time time consuming and sometimes frustrating is now so simple. Finally an app that shows multiple measures ALL at once, no back and forth just right there at your fingertips. Many thanks to the developers, brilliant job.

TheRightRev ,

It doesn't get any better than this!

I have had a number of conversion apps, but this tops them all. For ease-of-use, accuracy, ability to customize, and scope of the range, this app cannot be beat. You've got to be nuts not to have this on your phone!


Cider Software LLC
12.5 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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