# Modern RPN vs Loud Alarm Clock

The clearest difference is price: Loud Alarm Clock at Free against Modern RPN's $2.99. Loud Alarm Clock also leads on ratings volume (7 vs 1). Modern RPN's advantage is in-app purchases (none vs 3). On rating, review sentiment, update cadence and ads there is nothing between them.

Loud Alarm Clock is free to download; Modern RPN costs $2.99 up front. Loud Alarm Clock sells 3 in-app purchases, starting at $2.99 per month. Modern RPN asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Modern RPN against 5.0 for Loud Alarm Clock. That said, the two scores are not equally well evidenced: Loud Alarm Clock has 7 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.

Modern RPN ships an update every 5 days, Loud Alarm Clock every 4 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Modern RPN | Loud Alarm Clock |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/modern-rpn/id6760340697/reviews) | [5.0 (7 ratings)](https://appshunter.io/ios/app/loud-alarm-clock-riser/id6760366215/reviews) |
| Number of ratings | 1 | **7** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 4 days** |
| Monetization | Paid | **Freemium** |
| Size | 2 MB | 74 MB |
| Requires iOS | 26.2 | **26.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kevin Flathers](https://appshunter.io/developer/1883973737) | [Charlie Courtenay](https://appshunter.io/developer/1805176845) |

## What reviewers say

### 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


### Loud Alarm Clock

[App page](https://appshunter.io/ios/app/loud-alarm-clock-riser/id6760366215)

This app helps you build an earlier wake-up habit by gradually shifting your alarm earlier each day. It offers a sustainable approach to becoming an early riser by starting from your current wake-up time and moving towards your goal at a pace you choose.

**Highlights:** Gradual alarm shifting, Customizable pace, Progress tracking, Achievement badges, Home/Lock Screen widgets, Simple setup

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RISER: PRO Monthly Plan | $2.99 | per month |
| RISER: PRO Yearly Plan | $19.99 | per year |
| RISER: PRO Lifetime | $2.99 | one-time |


## Frequently asked questions

### Is Modern RPN free?

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

### Is Loud Alarm Clock free?

Loud Alarm Clock is free to download, with in-app purchases available.

### Which has better reviews, Modern RPN or Loud Alarm Clock?

Modern RPN and Loud Alarm Clock are both rated 5.0 out of 5 on the App Store, from 1 and 7 ratings respectively.

### Do Modern RPN or Loud Alarm Clock have ads?

Neither Modern RPN nor Loud Alarm Clock shows ads.

### Which is updated more often, Modern RPN or Loud Alarm Clock?

Modern RPN ships an update every 5 days, and Loud Alarm Clock every 4 days. Most recently, Modern RPN was updated on October 28, 2026 and Loud Alarm Clock 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.*