# Complex RPN Calculator vs Plottron

The clearest difference is review sentiment: Plottron at 100% against Complex RPN Calculator's 52%. Plottron also leads on rating (4.8 vs 3.8). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Plottron holds the better App Store score, 4.8 against 3.8. Both are backed by a comparable volume of ratings — 22 and 12 respectively. Written reviews point the same way: 52% of Complex RPN Calculator's written reviews are positive against 100% of Plottron's.

Both ship on a similar rhythm, roughly every 5 months. The most recent releases landed on August 23, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Complex RPN Calculator | Plottron |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (22 ratings)](https://appshunter.io/ios/app/complex-rpn-calculator/id291826330/reviews) | **[4.8 (12 ratings)](https://appshunter.io/ios/app/plottron/id1037723649/reviews)** |
| Number of ratings | **22** | 12 |
| Positive reviews | 51.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | Every 5 months |
| Monetization | Free | Free |
| Size | 1 MB | 2 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [John Coddington](https://appshunter.io/developer/291826333) | [Billy Lin](https://appshunter.io/developer/1037723648) |

## What reviewers say

### Complex RPN Calculator

[App page](https://appshunter.io/ios/app/complex-rpn-calculator/id291826330)

This scientific calculator utilizes a four-level stack and natively handles complex numbers. It allows users to input and view numbers in both polar and rectangular formats, remembering its state and offering 10 memory locations.

**Highlights:** Complex number support, Four-level stack, Polar and rectangular formats, State persistence, 10 memory locations, Scientific calculations

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- ✅ Great RPN functionality
- ✨ Complex number support
- 🆓 Free to use
- 🚫 No ads or in-app purchases
- 💻 Works on macOS

**What reviewers complain about**

- 🎨 SwiftUI design is ugly
- 🐌 Slow keyboard response
- 🖱️ Clunky operation
- 📉 Complex number operations limited
- ⚠️ Broken on newer iOS versions (historically)

**Reported bugs**

- Mutes other apps when used
- Slow keyboard response after update
- X^3 calculation incorrect for large imaginary numbers
- App crashes on opening/button press (historical iOS 9 issues)
- App starts upside down in landscape on iPad (historical iOS 8 issue)

**Requested features**

- Turn off key click sound
- Customize number display
- See the stack
- Fix slow entry response
- Fix imaginary number calculation (X^3)


### Plottron

[App page](https://appshunter.io/ios/app/plottron/id1037723649)

This application offers advanced 2D and 3D graphing capabilities for various function types, alongside a comprehensive scientific calculator. It supports implicit graphing, complex number visualization, and symbolic differentiation. The calculator includes user-defined variables, live evaluation, and probability density functions.

**Highlights:** 2D and 3D graphing, Implicit graphing, Complex number visualization, Symbolic differentiation, User-defined variables and functions, Live evaluation, Calculation history

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Complex RPN Calculator free?

Complex RPN Calculator is free to download, with no in-app purchases.

### Is Plottron free?

Plottron is free to download, with no in-app purchases.

### Which has better reviews, Complex RPN Calculator or Plottron?

Plottron is rated higher. Complex RPN Calculator averages 3.8 out of 5 from 22 ratings, while Plottron averages 4.8 from 12 ratings.

### Do Complex RPN Calculator or Plottron have ads?

Neither Complex RPN Calculator nor Plottron shows ads.

### Which is updated more often, Complex RPN Calculator or Plottron?

Complex RPN Calculator ships an update every 5 months, and Plottron every 5 months. Most recently, Complex RPN Calculator was updated on August 23, 2026 and Plottron on September 14, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*