# RPN Comp Calc — RPN with complex numbers

> RPN with complex numbers (iPhone/iPad app by MARK DEWEY KEENAN.)

- Source: https://appshunter.io/ios/app/rpn-comp-calc/id6761850505 (this page in markdown: same URL + `.md`)
- Developer: [MARK DEWEY KEENAN](https://appshunter.io/developer/1891762602)
- Category: Utilities, Education
- Price: Free
- Age rating: 4+
- Requires: iOS 26.4 · 1 MB
- Languages: American English
- Released: 2026-11-02
- Data updated: 2026-11-04

## What is RPN Comp Calc?

A serious RPN calculator with a four-level stack, built the way HP taught us: ENTER, then operate. No equals key, no parentheses, no ceremony.

Full scientific keyboard: trig and inverse trig (2nd key), hyperbolic functions and their inverses, logs and exponentials in every base you actually use, powers and roots, factorial and gamma, plus a curated screen of twelve physical constants (CODATA/SI-2019) one tap away.

Then the part most calculators skip: a true complex-number mode. Flip to CPX and every register holds a complex value. Enter real and imaginary parts directly, see results in rectangular or polar form (r ∠ θ), and use exp, log, powers, trig and hyperbolics across the complex domain with principal-value conventions. Degrees or radians, honored everywhere.

Designed for people who think in stacks: classic stack lift, roll, swap and drop; a live four-register display so you always see T, Z, Y and X; degree/radian and fixed/scientific display toggles; haptic keys.

No ads. No accounts. No tracking. No network access at all. Your calculator is yours.

## Is RPN Comp Calc safe?

Not enough ratings yet to assess RPN Comp Calc.

## Is RPN Comp Calc legit?

RPN Comp Calc has limited verification signals. The AppsHunter Legitimacy Score for RPN Comp Calc is 50 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-11-02

No release notes.

## Related topics

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

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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 2026-11-04.*