Function Calc

Function Calc

fully programmable calculator

3 ratings
5 reviews
Free

Details

  • Released
  • Updated
  • January 9, 2017
  • June 21, 2026

Features

Function Calc screenshot #1 for iPhone
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About

This app offers a powerful, programmable scientific calculator with graphing capabilities. It allows users to create custom functions, store equations, and perform complex calculations with ease. The interface features a visible tape display and supports dictation for statistical analysis.

Programmable custom functions
Graphing capabilities
Tape display with edit/undo
Unit conversions (120+)
Dictate calculations
Export graphs (PDF, PNG)
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What's New in Function Calc

17.4

June 21, 2026

Fine tuning and some bug fixes.

User reviews

Incredibly Comprehensive!

This is probably THE MOST POWERFUL calculator app in existance today. And it is completely FREE and SECURE. The only dowside is the almost vertical learning curve.

This app is so great but make it the greatest

Hugh,

I have dedicated some times to evaluate your product.

I rate it as 5 although it needs some enhancements.

Kindly please find time in future versions to include if , for , else or then statements, loops, max and min to make it the greatest. Even more so it is able to add graphics on the background for a certain repetitive problem.

I salute you even more as you are giving it free to humanity and for that you are truly blessed.

Hope to see these enhancements soon and more
feedback from me.

Thank you very much!

Vernon P., PE, MAA emeritus
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Great functionality, but want more precision

As a programmer I use the calculator to work with large numbers and sometimes I need to see more digits.

For example:
268,697,600 x 512 shows 1.37573171e11 but is missing the last (9th) digit in the general display - although in the history tab it displays accurately, but this can be confusing and annoying.
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This work in portrait mode

I installed this because one of the first statements was that it works in portrait mode, it doesn’t. Uninstalled.

Clean and simple. I like it!!

Very good calculator app. Wow, no ads and it’s free. Thx

Developer apps

FAQ

What makes Function Calc a programmable calculator?

Function Calc allows you to create, store, and use custom functions with up to ten inputs or outputs. This means you can automate complex or repetitive calculations, reducing errors and saving time.

Can Function Calc graph functions?

Yes, Function Calc features fully zoomable graphing capabilities. You can plot one or two functions on a graph and export high-resolution copies as PNG or PDF files.

How does the tape display in Function Calc work?

The tape display shows all your calculations as you type them, providing a visible record. You can easily select and input numbers directly from the tape, undo steps, or edit previous calculations.

Does Function Calc support dictation?

Yes, you can dictate calculations or lists of numbers for statistical analysis directly into Function Calc. The app provides instant results for your dictated inputs.

How many unit conversions does Function Calc offer?

Function Calc includes instant conversion between more than 120 different units, making it a versatile tool for various scientific and everyday tasks.

Is Function Calc available on other devices besides iPhone?

Based on the provided data, Function Calc is currently supported on iPhone. Information about availability on other platforms like Android or desktop is not specified.

How often is Function Calc updated?

Function Calc was last updated on February 16, 2026, indicating a recent update. The app has a version number of 17.2.

What is the age rating for Function Calc?

Function Calc has an age rating of 4+, making it suitable for a wide range of users including younger individuals.