# RPN vs DM50

The clearest difference is update cadence: DM50 at monthly against RPN's every 3 months. DM50 also leads on price ($0.99 vs $3.99) and device support (4 vs 2). RPN's advantage is iOS requirement (12.0 vs 15.6). On ads and in-app purchases there is nothing between them.

RPN costs $3.99 and DM50 $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RPN ships an update every 3 months, DM50 monthly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | RPN | DM50 |
| --- | --- | --- |
| Price | $3.99 | **$0.99** |
| 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 | **Monthly** |
| Monetization | Paid | — |
| Size | 63 MB | 1 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [CuVee Software](https://appshunter.io/developer/424873503) | [Javier Bascones](https://appshunter.io/developer/473518239) |

## 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


### DM50

[App page](https://appshunter.io/ios/app/dm50/id6760961234)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RPN free?

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

### Is DM50 free?

DM50 costs $0.99, with no in-app purchases.

### Do RPN or DM50 have ads?

Neither RPN nor DM50 shows ads.

### Which is updated more often, RPN or DM50?

RPN ships an update every 3 months, and DM50 monthly. Most recently, RPN was updated on October 24, 2026 and DM50 on October 25, 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.*