# SigiCalc

> Graphical RPN calculator with equation plotting and undo functionality. (iPhone/iPad app by Siegware.)

- Source: https://appshunter.io/ios/app/sigicalc/id522503444 (this page in markdown: same URL + `.md`)
- Developer: [Siegware](https://appshunter.io/developer/443908611)
- Category: Education, Utilities
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 1 MB
- Languages: American English
- Released: 2012-05-10
- Data updated: 2026-06-25
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/sigicalc/id522503444/reviews.md

## What is SigiCalc?

SigiCalc is a simple and practical graphical RPN (reverse polish notation) calculator with undo functionality.
Just type any mathematical equation and see the graphical plot for it.

## Key features

- Graphical RPN calculator
- Equation plotting
- Undo functionality
- Simple interface
- Practical calculations

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/sigicalc/id522503444/reviews.md

### 1/5 — Aargh! The colours!

*2020-01-16*

AT less than 0.5MB, this little thing is quite powerful for its weight.

Unfortunately, the hideous colour scheme is difficult to ignore. The tiny key digits are difficult to read, particularly on the dark blue keys.
- And just when you think you may be able to persevere, the operator keys also get wiped out by suddenly changing to that crazy blue for no apparent reason (a very odd, and most unwelcome peculiarity!).

Please subdue the colour!
In its present form, it's virtually unusable, which is a great shame…

### 5/5 — review

*2012-05-10*

best graphing app i've ever download.

## Frequently asked questions about SigiCalc

### What is SigiCalc's learning methodology?

SigiCalc focuses on practical application of mathematical concepts through its RPN input and graphical plotting. It allows users to visualize equations, aiding in understanding complex relationships between variables.

### How does SigiCalc track user progress?

SigiCalc does not explicitly track user progress in a formal sense. Its utility lies in providing immediate feedback through equation plotting and calculation results, allowing users to self-assess their understanding.

### Does SigiCalc offer certifications?

No, SigiCalc does not offer any certifications. It is a tool designed for calculation and visualization, not for formal academic accreditation.

### What devices is SigiCalc compatible with?

SigiCalc is available for iPhone, iPad, and iPod touch devices, running on iOS.

### What is the age rating for SigiCalc?

SigiCalc has an age rating of 4+, making it suitable for a wide range of users, including younger students.

### How often is SigiCalc updated?

The latest version, 2.1, was released on February 8, 2022. Updates are provided by the developer, Siegware, to maintain functionality and compatibility.

### Does SigiCalc have ads?

No, SigiCalc does not contain advertisements. It is a completely ad-free application.

### What is the user sentiment for SigiCalc?

Based on the available data, SigiCalc has a perfect rating of 5.0 stars from one review, indicating highly positive user sentiment.

## Version history (last 4 releases)

### 2.1 — 2022-02-08

Bug fixes:
• update to newest iOS

### 2.0 — 2015-09-29

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

-Adapted to iOS8, iOS9
- ready for iPad as well

### 1.01 — 2012-05-17

- bug fix of displaying results
- show sum of stack in display, if no operations pressed

==> Download it free all day on the Feb 20 ! <==

### 1.0 — 2012-05-10

No release notes.

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## More apps by Siegware

- [C-Time](https://appshunter.io/ios/app/c-time/id553940406)
- [C-Time Lite](https://appshunter.io/ios/app/c-time-lite/id615668212)

All apps by Siegware: https://appshunter.io/developer/443908611

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*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 2026-06-25.*