# RPN vs DB50X

The clearest difference is review sentiment: DB50X at 100% against RPN's 50%. DB50X also leads on rating (5.0 vs 4.0) and update cadence (every 3 weeks vs every 3 months). RPN's advantage is price ($3.99 vs $9.99) and iOS requirement (12.0 vs 14.0). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

RPN costs $3.99 and DB50X $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

DB50X holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 4 and 9 respectively. Written reviews point the same way: 50% of RPN's written reviews are positive against 100% of DB50X's.

RPN ships an update every 3 months, DB50X every 3 weeks. The most recent releases landed on November 2, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | RPN | DB50X |
| --- | --- | --- |
| Price | **$3.99** | $9.99 |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/rpn-65-pro/id1033260498/reviews) | **[5.0 (9 ratings)](https://appshunter.io/ios/app/db50x/id6625971367/reviews)** |
| Number of ratings | 4 | **9** |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Paid | Paid |
| Size | 86 MB | 7 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [CuVee Software](https://appshunter.io/developer/424873503) | [Christophe de Dinechin](https://appshunter.io/developer/1761608161) |

## What reviewers say

### RPN

[App page](https://appshunter.io/ios/app/rpn-65-pro/id1033260498)

Experience a faithful simulation of the groundbreaking HP-65 programmable calculator on your iPad. This app offers virtual program and data cards, a powerful card manager, and includes 170 original HP programs to get you started.

**Highlights:** Virtual program and data cards, Virtual paper tape printer, Database-driven card manager, Create, delete, label, and organize cards, Share via email, AirDrop, Dropbox, print, Paste and run existing HP-65 listings, Live display of stack and registers, Four operational modes including 'Super-65'

**Features:** macOS Compatibility

**In-app purchases:** none


### DB50X

[App page](https://appshunter.io/ios/app/db50x/id6625971367)

This scientific calculator offers high-precision computations with arbitrary precision for numbers. It supports advanced functions like complex numbers, matrices, symbolic calculations, and graphing, with a user-friendly interface and extensive built-in help.

**Highlights:** Arbitrary precision calculations, RPN and algebraic operations, Complex numbers, vectors, matrices, Symbolic and numerical solving, Graphing and plotting, Engineering units and constants, Unicode text support

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

**In-app purchases:** none


## Frequently asked questions

### Is RPN free?

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

### Is DB50X free?

DB50X costs $9.99, with no in-app purchases.

### Which has better reviews, RPN or DB50X?

DB50X is rated higher. RPN averages 4.0 out of 5 from 4 ratings, while DB50X averages 5.0 from 9 ratings.

### Do RPN or DB50X have ads?

Neither RPN nor DB50X shows ads.

### Which is updated more often, RPN or DB50X?

RPN ships an update every 3 months, and DB50X every 3 weeks. Most recently, RPN was updated on November 2, 2026 and DB50X on November 8, 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.*