# Copper vs RPN

The clearest difference is review sentiment: RPN at 100% against Copper's 47%. RPN also leads on rating (5.0 vs 3.3) and price ($1.99 vs $4.99). Copper's advantage is iOS requirement (9.3 vs 12.0). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

Copper costs $4.99 and RPN $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RPN holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 13 and 14 respectively. Written reviews point the same way: 47% of Copper's written reviews are positive against 100% of RPN's.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Copper | RPN |
| --- | --- | --- |
| Price | $4.99 | **$1.99** |
| Rating | [3.3 (13 ratings)](https://appshunter.io/ios/app/copper-eagle-cad-viewer/id1070984826/reviews) | **[5.0 (14 ratings)](https://appshunter.io/ios/app/rpn-34-ce/id1448593029/reviews)** |
| Number of ratings | 13 | **14** |
| Positive reviews | 47.4% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Paid | Paid |
| Best chart rank | — | **#142** |
| Size | 78 MB | 16 MB |
| Requires iOS | **9.3** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Phillip Schuster](https://appshunter.io/developer/1048885754) | [CuVee Software](https://appshunter.io/developer/424873503) |

## What reviewers say

### Copper

[App page](https://appshunter.io/ios/app/copper-eagle-cad-viewer/id1070984826)

View and analyze EAGLE CAD files, including PCB layouts and schematics, directly on your mobile device. Create and render photorealistic 3D models of your PCBs with customizable lighting and materials. Organize your imported files into a convenient pocket library.

**Highlights:** View EAGLE CAD files, Analyze PCB layouts and schematics, Create 3D PCB models, Assign 3D models to footprints, Real-time photorealistic rendering, Import files from various sources, Organize files in a personal library

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

**In-app purchases:** none


### RPN

[App page](https://appshunter.io/ios/app/rpn-34-ce/id1448593029)

**Currently charting:** #142 Top Paid · Productivity (US App Store)

This app simulates a legendary scientific calculator, offering photo-realistic visuals and advanced functions like integration and root finding. It includes built-in programs and extensions for enhanced usability, making it a powerful tool for complex calculations.

**Highlights:** Photo-realistic look-and-feel, Programmable with 999 steps, Integration and root solving, Built-in application programs, Live register view, Program library and backup, Sharing via email, AirDrop, Dropbox

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Copper free?

Copper costs $4.99, with no in-app purchases.

### Is RPN free?

RPN costs $1.99, with no in-app purchases.

### Which has better reviews, Copper or RPN?

RPN is rated higher. Copper averages 3.3 out of 5 from 13 ratings, while RPN averages 5.0 from 14 ratings.

### Do Copper or RPN have ads?

Neither Copper nor RPN shows ads.

### Which is updated more often, Copper or RPN?

Copper ships an update every 3 months, and RPN every 3 months. Most recently, Copper was updated on October 24, 2026 and RPN on October 29, 2026.

---

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