# HP-35

> RPN Calculator. HP-35, 45, 21

Canonical page: [https://chrome-stats.com/d/id6738010641](https://chrome-stats.com/d/id6738010641)

## Overview

- **ID:** `id6738010641`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Enrique Haro
- **Category:** Utilities
- **Rating:** 4.50 / 5 (46 ratings)
- **Version:** 2.6
- **Last updated:** 2026-03-22
- **First published:** 2024-11-13
- **Size:** 2.09 MB
- **Data as of:** 2026-09-06
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/hp-35/id6738010641)
- **Website:** [https://github.com/eharo2/HP-35](https://github.com/eharo2/HP-35)
- **Privacy policy:** [https://x.com/enrique\_haro](https://x.com/enrique_haro)

## Description

The classic Hewlett Packard RPN (Reverse Polish Notation) calculators.
- HP-35, HP-45. First pocket scientific calculators (1972). 
- HP-21. 2nd gen of the HP-35 (1975)

## Rankings

- #181,824 — Overall

## Similar extensions and apps

- [RPN-35 SD](https://chrome-stats.com/d/id956224485) — 4.40 / 5
- [RPN-45 SD](https://chrome-stats.com/d/id509923051) — 4.30 / 5
- [RPN-25 CE](https://chrome-stats.com/d/id1529311398) — 4.60 / 5
- [RPN-34 CE](https://chrome-stats.com/d/id1448593029) — 5.00 / 5
- [RPN-45 HD](https://chrome-stats.com/d/id424873500) — 4.80 / 5
- [GO-21 SciRPN](https://chrome-stats.com/d/id327651563) — 4.90 / 5
- [RPN-32 CE](https://chrome-stats.com/d/id1082637146) — 5.00 / 5
- [RPNPro](https://chrome-stats.com/d/id603155368) — 5.00 / 5
- [My RPN Calc](https://chrome-stats.com/d/id807032892) — 3.00 / 5
- [RPN-55 SD](https://chrome-stats.com/d/id1469907917) — 5.00 / 5

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6738010641)