# RPN vs DB48X

The clearest difference is price: RPN at Free against DB48X's $4.99. RPN also leads on iOS requirement (12.0 vs 14.0). DB48X's advantage is update cadence (every 3 weeks vs every 7 months). On rating, review sentiment, ratings volume and ads there is nothing between them.

RPN is free to download; DB48X costs $4.99 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 — 4.7 for RPN against 4.8 for DB48X. Both are backed by a comparable volume of ratings — 11 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

RPN ships an update every 7 months, DB48X every 3 weeks. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | RPN | DB48X |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [4.7 (11 ratings)](https://appshunter.io/ios/app/rpn-70-sd/id738422213/reviews) | **[4.8 (4 ratings)](https://appshunter.io/ios/app/db48x/id6615086535/reviews)** |
| Number of ratings | **11** | 4 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | **Free** | 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-70-sd/id738422213)

This app is a faithful simulation of a rare 1974 financial calculator, offering all its original functions with enhanced features like more memory registers and a visual stack display. It's designed for users who appreciate vintage technology and need precise financial calculations.

**Highlights:** Photo-realistic vintage calculator design, Full HP-70 function simulation, Animated keys with sound, Enhanced stack and memory register view, Cut/copy/paste display value, Input parameter visual indicators

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

**In-app purchases:** none


### DB48X

[App page](https://appshunter.io/ios/app/db48x/id6615086535)

This advanced scientific calculator offers arbitrary precision computations, RPN and algebraic operations, and extensive graphing capabilities. It supports complex numbers, matrices, symbolic calculations, and over 1000 built-in functions, inspired by the HP48 series.

**Highlights:** Arbitrary precision computations, RPN and algebraic operations, Complex numbers, vectors, and matrices, Symbolic computations and numerical solving, Graphing and plotting, Engineering units and currency conversion, Built-in hyperlinked help system

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

**In-app purchases:** none


## Frequently asked questions

### Is RPN free?

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

### Is DB48X free?

DB48X costs $4.99, with no in-app purchases.

### Which has better reviews, RPN or DB48X?

DB48X is rated higher. RPN averages 4.7 out of 5 from 11 ratings, while DB48X averages 4.8 from 4 ratings.

### Do RPN or DB48X have ads?

Neither RPN nor DB48X shows ads.

### Which is updated more often, RPN or DB48X?

RPN ships an update every 7 months, and DB48X every 3 weeks. Most recently, RPN was updated on October 20, 2026 and DB48X on October 24, 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.*