WWPass Key vs Modern RPN
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WWPass Key
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.
- Universal authentication
- Secure login
- Passwordless access
- QR code scanning
- Easy to use
Read full descriptionHide full description
The WWPass Key is your universal, secure, and easy-to-use authentication key. With WWPass Key, you don't need to remember usernames and passwords anymore. Just scan the authentication QR code on a website that supports WWPass, and you are in. Tap the QR code or click the "Log in with WWPass" button in your mobile device browser to log in on your smartphone or tablet itself.
Modern RPN
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.
- Reverse Polish Notation (RPN) input
- Standard, Binary, and Hex modes
- 4-level visible stack
- Calculation history
- Saved session state
- Clean dark interface
Read full descriptionHide full description
Modern RPN is a minimalist reverse polish notation calculator for iPhone and iPad, with Standard, Binary, and Hex modes for fast everyday math and programmer-friendly conversions. Use a clean 4-level stack, instant mode switching, calculation history, and saved session state to move quickly without clutter. Features: • True RPN input with ENTER to push or duplicate values • Standard, Binary, Financial, and Hex calculator modes • Mode-aware entry and display formatting • 4-level visible stack: T, Z, Y, X • Core operations: add, subtract, multiply, divide • Stack tools: POP, X/Y swap, sign toggle, backspace, and all clear • Calculation history with timestamps • History filtering by All, Standard, Binary, Financial, or Hex • Saved session state for your current mode, stack, and in-progress input • Clean dark interface designed for focus and readability • No accounts, no ads, no data collection Modern RPN is designed for people who want the speed of a classic RPN calculator with a modern iOS interface.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | WWPass Key | Modern RPN |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 4.9 (10 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 10 — better | 1 |
| Update frequency | Every 3 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.6 — better | 26.2 |
| Further details — not scored | ||
| Size | 47 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | WWPass Corporation | Kevin Flathers |
Customer experience
WWPass Key
Modern RPN
In-app purchases
WWPass Key
No in-app purchases
Modern RPN
No in-app purchases
