# SubcommPools vs RPN

The clearest difference is price: SubcommPools at Free against RPN's $1.99. RPN's advantage is ratings volume (8 vs 2) and iOS requirement (12.0 vs 15.6). On rating, review sentiment, update cadence and ads there is nothing between them.

SubcommPools is free to download; RPN costs $1.99 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 — 5.0 for SubcommPools against 5.0 for RPN. Both are backed by a comparable volume of ratings — 2 and 8 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on September 9, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | SubcommPools | RPN |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/subcommpools/id1460464963/reviews) | [5.0 (8 ratings)](https://appshunter.io/ios/app/rpn-55-sd/id1469907917/reviews) |
| Number of ratings | 2 | **8** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | **Free** | Paid |
| Size | 63 MB | 17 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Subcomm LLC](https://appshunter.io/developer/1460464962) | [CuVee Software](https://appshunter.io/developer/424873503) |

## What reviewers say

### SubcommPools

[App page](https://appshunter.io/ios/app/subcommpools/id1460464963)

Manage your pool service history with this app. View detailed reports including measurements, chemical levels, and technician messages. Receive real-time notifications for completed visits with comprehensive reports.

**Highlights:** Full pool service history, Detailed visit reports, Chemical and measurement logs, Technician messages and images, Real-time visit completion notifications

**Features:** macOS Compatibility

**In-app purchases:** none


### RPN

[App page](https://appshunter.io/ios/app/rpn-55-sd/id1469907917)

This app is a photo-realistic simulation of a classic Hewlett-Packard programmable scientific calculator from the 1970s. It includes a 100-hour digital timer, clock functions, and original HP programs.

**Highlights:** Photo-realistic look-and-feel, Programmable with conditional branching, 100-hr timer and 12/24-hr clock, Original HP programs built-in, Extended features for enhanced usability, Sharing via email, AirDrop, and more

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SubcommPools free?

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

### Is RPN free?

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

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

SubcommPools and RPN are both rated 5.0 out of 5 on the App Store, from 2 and 8 ratings respectively.

### Do SubcommPools or RPN have ads?

Neither SubcommPools nor RPN shows ads.

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

SubcommPools ships an update every 3 months, and RPN every 3 months. Most recently, SubcommPools was updated on September 9, 2026 and RPN on September 6, 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.*