# RPN vs shenqiwei

The clearest difference is price: shenqiwei at Free against RPN's $3.99. shenqiwei also leads on update cadence (every 5 days vs every 3 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

shenqiwei is free to download; RPN costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RPN ships an update every 3 months, shenqiwei every 5 days. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | RPN | shenqiwei |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.6 (17 ratings)](https://appshunter.io/ios/app/rpn-67-sd/id1109722386/reviews)** | — |
| Number of ratings | **17** | — |
| Positive reviews | 92.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | Paid | — |
| Size | 63 MB | 489 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [CuVee Software](https://appshunter.io/developer/424873503) | [jinsong liu](https://appshunter.io/developer/1744261953) |

## What reviewers say

### RPN

[App page](https://appshunter.io/ios/app/rpn-67-sd/id1109722386)

This app simulates a vintage programmable calculator from the mid-70s, offering enhanced features beyond the original. It allows users to run existing programs, manage virtual cards, and utilize advanced functions for scientific and engineering tasks.

**Highlights:** Virtual program and data cards, Virtual paper tape printer, Database-driven card manager, Create, label, and organize unlimited cards, Share cards via email, AirDrop, Dropbox, Editable program listings, Enhanced features for more program steps and registers

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

**In-app purchases:** none


### shenqiwei

[App page](https://appshunter.io/ios/app/shenqiwei/id6740011899)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RPN free?

RPN costs $3.99, with no in-app purchases.

### Is shenqiwei free?

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

### Do RPN or shenqiwei have ads?

Neither RPN nor shenqiwei shows ads.

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

RPN ships an update every 3 months, and shenqiwei every 5 days. Most recently, RPN was updated on November 4, 2026 and shenqiwei on October 30, 2026.

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