# WWPass Key vs Modern RPN

The clearest difference is price: WWPass Key at Free against Modern RPN's $2.99. WWPass Key also leads on ratings volume (10 vs 1) and iOS requirement (16.6 vs 26.2). Modern RPN's advantage is update cadence (every 5 days vs every 3 months). On rating, review sentiment, ads and in-app purchases there is nothing between them.

WWPass Key is free to download; Modern RPN costs $2.99 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 — 4.9 for WWPass Key against 5.0 for Modern RPN. That said, the two scores are not equally well evidenced: WWPass Key has 10 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

WWPass Key ships an update every 3 months, Modern RPN every 5 days. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | WWPass Key | Modern RPN |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [4.9 (10 ratings)](https://appshunter.io/ios/app/wwpass-key/id984532938/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/modern-rpn/id6760340697/reviews)** |
| Number of ratings | **10** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | **Free** | Paid |
| Size | 47 MB | 2 MB |
| Requires iOS | **16.6** | 26.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [WWPass Corporation](https://appshunter.io/developer/984532937) | [Kevin Flathers](https://appshunter.io/developer/1883973737) |

## What reviewers say

### WWPass Key

[App page](https://appshunter.io/ios/app/wwpass-key/id984532938)

This app provides a universal, secure, and simple authentication method, eliminating the need to remember usernames and passwords. Users can quickly log in to supported websites by scanning a QR code or tapping a button on their mobile device.

**Highlights:** Universal authentication, Secure login, Passwordless access, QR code scanning, Easy to use

**Features:** Vision Pro support

**In-app purchases:** none


### Modern RPN

[App page](https://appshunter.io/ios/app/modern-rpn/id6760340697)

A minimalist reverse Polish notation calculator for iOS devices. It offers Standard, Binary, and Hex modes for quick calculations and programmer-friendly conversions, featuring a clean interface and a 4-level stack.

**Highlights:** Reverse Polish Notation (RPN) input, Standard, Binary, and Hex modes, 4-level visible stack, Calculation history, Saved session state, Clean dark interface

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WWPass Key free?

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

### Is Modern RPN free?

Modern RPN costs $2.99, with no in-app purchases.

### Which has better reviews, WWPass Key or Modern RPN?

Modern RPN is rated higher. WWPass Key averages 4.9 out of 5 from 10 ratings, while Modern RPN averages 5.0 from 1 ratings.

### Do WWPass Key or Modern RPN have ads?

Neither WWPass Key nor Modern RPN shows ads.

### Which is updated more often, WWPass Key or Modern RPN?

WWPass Key ships an update every 3 months, and Modern RPN every 5 days. Most recently, WWPass Key was updated on November 1, 2026 and Modern RPN on October 31, 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.*