# RPN vs DB50X

The clearest difference is price: RPN at $1.99 against DB50X's $9.99. RPN also leads on iOS requirement (12.0 vs 14.0). DB50X's advantage is update cadence (every 3 weeks vs every 3 months). On rating, review sentiment, ratings volume and ads there is nothing between them.

RPN costs $1.99 and DB50X $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for RPN against 5.0 for DB50X. Both are backed by a comparable volume of ratings — 8 and 8 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

RPN ships an update every 3 months, DB50X every 3 weeks. The most recent releases landed on October 20, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | RPN | DB50X |
| --- | --- | --- |
| Price | **$1.99** | $9.99 |
| Rating | [5.0 (8 ratings)](https://appshunter.io/ios/app/rpn-55-sd/id1469907917/reviews) | [5.0 (8 ratings)](https://appshunter.io/ios/app/db50x/id6625971367/reviews) |
| Number of ratings | 8 | 8 |
| Positive reviews | 100.0% 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 | 17 MB | 7 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPod | **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-55-sd/id1469907917)

This app is a photo-realistic simulation of a classic Hewlett-Packard programmable scientific calculator from the 1970s. It includes a 100-hour digital timer, clock functions, and original HP programs.

**Highlights:** Photo-realistic look-and-feel, Programmable with conditional branching, 100-hr timer and 12/24-hr clock, Original HP programs built-in, Extended features for enhanced usability, Sharing via email, AirDrop, and more

**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 $1.99, with no in-app purchases.

### Is DB50X free?

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

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

RPN and DB50X are both rated 5.0 out of 5 on the App Store, from 8 and 8 ratings respectively.

### 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 October 20, 2026 and DB50X on October 27, 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.*