# SigiCalc

> RPN Graphing Calculator

Canonical page: [https://chrome-stats.com/d/id522503444](https://chrome-stats.com/d/id522503444)

## Overview

- **ID:** `id522503444`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Siegware
- **Category:** Education
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 3.0
- **Last updated:** 2026-08-29
- **First published:** 2012-05-10
- **Size:** 3.06 MB
- **Data as of:** 2026-09-16
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/sigicalc/id522503444)
- **Website:** [https://www.siegware.com/sigicalc/](https://www.siegware.com/sigicalc/)
- **Privacy policy:** [https://www.siegware.com/sigicalc/sigicalcprivacy.html](https://www.siegware.com/sigicalc/sigicalcprivacy.html)

## Description

RPN Graphing Calculator

SigiCalc is a fast, clean RPN calculator that draws your functions.

Enter a calculation the RPN way – numbers first, then the operation – and as soon as your expression contains X, tap Graph to see it plotted. No equals key, no parentheses, no fuss.

REAL RPN
• Classic stack-based entry with Enter, Undo and All Clear
• Keys light up only when the stack has enough values – you can't make an invalid entry
• The display shows your result, the whole expression in normal notation and the raw stack

LIVE FUNCTION GRAPHS
• Use X as a variable and plot the result instantly
• Pinch to zoom, drag to pan, tap to zoom in, double-tap to reset
• Touch and hold to read the exact x / y value on the curve
• Discontinuities like tan(x) or 1/x are drawn correctly – no misleading vertical lines

SCIENTIFIC FUNCTIONS
sin, cos, tan and their inverses, natural log, square, square root, reciprocal, sign change and π

DESIGNED FOR TODAY'S DEVICES
• Light and Dark Mode, portrait and landscape
• iPad: calculator and live graph side by side
• Smooth animations and haptic feedback

PRIVATE BY DESIGN
SigiCalc works entirely on your device. No account, no network, no ads, no tracking.

Example: X ↲ X sin × plots x · sin(x).

What changed versus your text and why:
- Leads with a benefit, not a category: "draws your functions" is the hook; "simple and practical graphical" told the reader nothing they'd search for.
- Explains RPN in one sentence for people who don't know it, since that's the biggest reason someone bounces.
- Bulleted feature blocks — App Store descriptions are skimmed, and the capitalised headings scan well in the store's plain-text rendering.
- Adds Dark Mode / iPad / privacy, all of which are new in 3.0 and are things reviewers and users look for.
- Fixed "polish" → "Polish" and "equation" → "expression" (you plot expressions, not equations).

## Rankings

- #917,950 — Overall

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- [RPN Calc Pro](https://chrome-stats.com/d/id6757244933)
- [RPN](https://chrome-stats.com/d/id6754224532)

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Source: [Chrome-Stats](https://chrome-stats.com/d/id522503444)