# RPN vs Vibration Detection

The clearest difference is price: RPN at $1.99 against Vibration Detection's $7.99. RPN also leads on update cadence (every 3 months vs every 10 months) and chart position (#183 vs unranked). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

RPN costs $1.99 and Vibration Detection $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RPN ships an update every 3 months, Vibration Detection every 10 months. The most recent releases landed on November 1, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | RPN | Vibration Detection |
| --- | --- | --- |
| Price | **$1.99** | $7.99 |
| Rating | **[5.0 (9 ratings)](https://appshunter.io/ios/app/rpn-32-ce/id1082637146/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 10 months |
| Monetization | Paid | Paid |
| Best chart rank | **#183** | — |
| Size | 14 MB | 11 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [CuVee Software](https://appshunter.io/developer/424873503) | [Sebastian Bub Software Distribution](https://appshunter.io/developer/311613696) |

## What reviewers say

### RPN

[App page](https://appshunter.io/ios/app/rpn-32-ce/id1082637146)

**Currently charting:** #183 Top Paid · Productivity (US App Store)

This app is a photo-realistic simulation of a classic scientific calculator, offering advanced programming capabilities beyond the original model. It includes a comprehensive set of mathematical functions and features for easy program management and sharing.

**Highlights:** Photo-realistic calculator simulation, Fully programmable with 99 steps, Extensive scientific and statistical functions, Program library and sharing options, Import and export programs, 44 pre-installed programs

**Features:** macOS Compatibility

**In-app purchases:** none


### Vibration Detection

[App page](https://appshunter.io/ios/app/vibration-detection/id1342366914)

Analyze and diagnose vibration issues in vehicles or other systems. This tool uses your device's accelerometer to measure frequencies, identify potential sources like wheels or cardan shafts, and visualize results in interactive charts.

**Highlights:** Create car projects with custom data, Measure and analyze vibration frequencies, Visualize results in interactive charts, Identify potential vibration sources, Export measurements and project data, Integrated vehicle analysis tool

**In-app purchases:** none


## Frequently asked questions

### Is RPN free?

RPN costs $1.99, with no in-app purchases.

### Is Vibration Detection free?

Vibration Detection costs $7.99, with no in-app purchases.

### Do RPN or Vibration Detection have ads?

Neither RPN nor Vibration Detection shows ads.

### Which is updated more often, RPN or Vibration Detection?

RPN ships an update every 3 months, and Vibration Detection every 10 months. Most recently, RPN was updated on November 1, 2026 and Vibration Detection on October 29, 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.*