# Simple RPN

> Utilities

Canonical page: [https://chrome-stats.com/d/id6771959257](https://chrome-stats.com/d/id6771959257)

## Overview

- **ID:** `id6771959257`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Nicolas Augsburger Rossi
- **Category:** Utilities
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 1.3.24
- **Last updated:** 2026-06-16
- **First published:** 2026-06-03
- **Size:** 1.77 MB
- **Data as of:** 2026-09-25
- **Store listing:** [Apple App Store](https://apps.apple.com/ch/app/simple-rpn/id6771959257?l=en-GB)
- **Privacy policy:** [https://stileottica.ch/privacy-policy](https://stileottica.ch/privacy-policy)

## Description

The RPN calculator for everyday use: 4-level stack, scientific functions, Tax, statistics and memory. Precise, elegant, ad-free.

The RPN calculator for everyday use.
Not just for engineers or scientists — for anyone who wants to calculate efficiently, precisely and without distractions. From the grocery store to the construction site, from the office to the lab.
Built on Reverse Polish Notation — the method used by Hewlett-Packard engineers since the 1970s — it eliminates parentheses and lets the stack manage the order of operations for you. Once you try it, you won't go back.
— 4-LEVEL STACK — T, Z, Y and X registers always visible. ENTER, DROP, SWAP and R↓ to navigate the stack with precision. Full history with unlimited Undo and Redo.
— SCIENTIFIC FUNCTIONS — Full trigonometry (sin, cos, tan and inverses) in degrees or radians. Natural and base-10 logarithms, exponentials, powers, roots, π. Factorial, MOD, configurable rounding in steps of 1, ½ or ¼.
— PERCENTAGES AND STATISTICS — Percentage of total (%T), percentage change (Δ%), TAX calculation with three customisable tax rates and instant reverse. Configurable tip calculator. Statistics accumulator with mean, selective add and remove.
— MEMORY — Ten persistent registers (M1–M10) saved between sessions. Perfect for exchange rates, project constants or any reference value.
— INTERFACE — Four-row display always easy to read. Sans or Mono font. Thousands separator, 0 to 10 decimal places, DEG/RAD mode with visual indicator. History browsing with a swipe on the display.
— AD-FREE — No banners, no notifications, no subscriptions. One complete app, forever.
Full user manual with examples: https://stileottica.ch/app

## Rankings

- #782,422 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6771959257)