# Modern RPN — Modern RPN calculator

> Minimalist reverse Polish notation calculator for iOS with multiple modes. (iPhone/iPad app by Kevin Flathers.)

- Source: https://appshunter.io/ios/app/modern-rpn/id6760340697 (this page in markdown: same URL + `.md`)
- Developer: [Kevin Flathers](https://appshunter.io/developer/1883973737)
- Category: Utilities, Productivity
- Price: $2.99
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 26.2 · 2 MB
- Languages: English
- Released: 2026-03-18
- Data updated: 2026-06-27
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/modern-rpn/id6760340697/reviews.md

## What is Modern RPN?

Modern RPN is a minimalist reverse polish notation calculator for iPhone and iPad, with Standard,
  Binary, and Hex modes for fast everyday math and programmer-friendly conversions.

  Use a clean 4-level stack, instant mode switching, calculation history, and saved session state to
  move quickly without clutter.

  Features:
  • True RPN input with ENTER to push or duplicate values
  • Standard, Binary, Financial, and Hex calculator modes
  • Mode-aware entry and display formatting
  • 4-level visible stack: T, Z, Y, X
  • Core operations: add, subtract, multiply, divide
  • Stack tools: POP, X/Y swap, sign toggle, backspace, and all clear
  • Calculation history with timestamps
  • History filtering by All, Standard, Binary, Financial, or Hex
  • Saved session state for your current mode, stack, and in-progress input
  • Clean dark interface designed for focus and readability
  • No accounts, no ads, no data collection

  Modern RPN is designed for people who want the speed of a classic RPN calculator with a modern iOS
  interface.

## Key features

- Reverse Polish Notation (RPN) input
- Standard, Binary, and Hex modes
- 4-level visible stack
- Calculation history
- Saved session state
- Clean dark interface

## Chart rankings

- #189 in Top Paid · Utilities (US App Store)

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/modern-rpn/id6760340697/reviews.md

### 5/5 — Amazing minimalist RPN calculator

*2026-03-18*

Absolutely love this minimalist RPN calculator app. Most of the ones out there have so many functions, and I really just need basic calculator operators with basic stack operations. Love it!

## Frequently asked questions about Modern RPN

### What is Modern RPN?

Modern RPN is a calculator app for iPhone and iPad that uses reverse Polish notation (RPN) for input. It offers Standard, Binary, and Hex modes for various calculation needs.

### What modes does Modern RPN support?

Modern RPN supports Standard mode for everyday calculations, Binary mode for base-2 operations, and Hexadecimal mode for base-16 operations, which are particularly useful for programmers.

### Does Modern RPN have ads?

No, Modern RPN is ad-free. The developer explicitly states 'no ads' in the app description, ensuring an uninterrupted user experience.

### How much does Modern RPN cost?

Modern RPN is a paid application, priced at $2.99. There are no in-app purchases or subscriptions required.

### What devices is Modern RPN compatible with?

Modern RPN is designed for iPhone and iPad devices, offering a native experience on both platforms.

### How often is Modern RPN updated?

The app was last updated on March 27, 2026, indicating recent development and support. The current version is 1.1.

### What are the core operations in Modern RPN?

Modern RPN supports core arithmetic operations including addition, subtraction, multiplication, and division. It also includes stack manipulation tools like POP, X/Y swap, and sign toggle.

### Does Modern RPN collect user data?

No, Modern RPN prioritizes user privacy and does not collect any user data. The description explicitly states 'no data collection'.

## Version history (last 3 releases)

### 1.2.1 — 2026-05-27

- Various bugfixes

### 1.1 — 2026-03-27

Version 1.1.0 adds major upgrades to Modern RPN:

  • New Standard, Binary, and Hex calculator modes
  • Mode-aware input and display formatting
  • Dedicated keypad layouts for binary and hexadecimal entry
  • History now shows mode badges and supports filtering by mode
  • Added per-entry delete and filtered clear actions in history
  • Session restore now preserves your mode, stack, and in-progress input
  • Refined layout, spacing, and history styling for a cleaner interface
  • Fixed keypad sizing and history clear behavior

### 1.0 — 2026-03-18

No release notes.

## Related topics

[modern rpn](https://appshunter.io/ios/topics/modern-rpn)

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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 2026-06-27.*