iPhone Screenshots


devCalc Pro is an optimum blend of an engineering, a scientific and a programmers calculator.

Special features:

• Easy number base conversion from Binary, Octal, Decimal and Hexadecimal (bin, oct, dec, hex)
• Real Engineering mode allows you to display big and small numbers in human readable format
• Extensive functions for Scientists and Software Developers - Rotate device to landscape mode
• Swipe LCD display sideways to change color theme

devCalc is designed from top to bottom developers and engineers in mind. As a hybrid scientific and programmer calculator it gives smooth blend for IT professionals, engineers and scientists as well as university students.

Real Engineering Mode is an innovative input and display method, that makes engineers life easier by automatically scaling the number to a human readable format. This allows you to concentrate on the calculation rather than how to translate that to a calculator friendly format.

To enter a number in Real Engineering Format even in decimal mode: Just tap on the Kilo, Mega, Giga, Milli, Micro or Nano buttons. The calculator then automatically scales the calculated numbers and displays it in the way you got used to.

For example 500k * 3 automatically displayed as 1.5M. In the meanwhile devCalc Pro keeps the high precision value, therefore later on you can switch the view back to Kilo to see 1'500k, or turning the Real Engineering Mode completely off by tapping on the "k" button again to see all the decimal digits (1'500'000). Try this new and unique feature out and tell us your story how you use Real Engineering Mode.

One of the great examples is to calculate Ohm’s law in electronics: You are looking for a resistor value for 5V and 3mA, so you type: 5 / 3m and you will see 1.67k on the screen (1.67 kilo-Ohm).

What’s New

Version 1.7

Thank you for using devCalc Pro!
We are providing iOS 11 support and various bug fixes and performance improvements with this release, please make sure to update it
Added up to 38 decimal places precision

Ratings and Reviews

4.7 out of 5
17 Ratings

17 Ratings

CL---CL ,

Best Calculator App I have found so far

Excellent job. The programmer functions are perfect for my needs. This is the best calculator App that I have found so far.

Jerry Hobby ,

Well Done

This is an intuitive and useful programmers calculator. You would expect there to be a lot of great calculators in the app, but there's not. This is the one to get.

I'm taking one star away due to nagging pop ups for reviews and for upgrading to pro. I do like the pro version. I just don't like the nag screens.

LynnArby ,

Great Calculator

I need to convert from Hex to Dec all the time in my work. This calculator not only converts but also let's me do calculation in any base.


Tamas Rudnai
1.6 MB

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



Age Rating
Rated 4+
© Tamas Rudnai


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

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