# Pool OS vs ReefCMD

The clearest difference is device support: ReefCMD at 3 against Pool OS's 1. On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Pool OS sells 2 in-app purchases, starting at $8.99 per month and ReefCMD sells 2 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Pool OS against 5.0 for ReefCMD. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Pool OS ships an update every 2 weeks, ReefCMD every 3 weeks. The most recent releases landed on October 10, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Pool OS | ReefCMD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/pool-os/id6762061986/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/reefcmd-reef-tank-management/id6769246761/reviews) |
| Number of ratings | 1 | **2** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free with in-app purchases | Freemium |
| Size | 8 MB | 18 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Chad Baugh](https://appshunter.io/developer/1892705205) | [ReefCMD LLC](https://appshunter.io/developer/1896642937) |

## What reviewers say

### Pool OS

[App page](https://appshunter.io/ios/app/pool-os/id6762061986)

This app offers modern, intuitive control for pool systems, focusing on speed, reliability, and ease of use for pool owners. It provides real-time weather alerts and advanced features like heat pump protection.

**Highlights:** Fast, responsive pool equipment control, Intuitive interface for pool owners, Real-time severe weather notifications, Automatic heat pump protection, Full control of Pentair systems, Local network connection

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PoolOS Premium (Monthly) | $8.99 | per month |
| PoolOS Premium (Annual) | $89.99 | per year |


### ReefCMD

[App page](https://appshunter.io/ios/app/reefcmd-reef-tank-management/id6769246761)

Manage your saltwater aquarium parameters, dosing, and livestock with this app. Track water quality, log maintenance, and get a health score for your reef tank. Features an animal library and controller integration.

**Highlights:** Track water parameters (alkalinity, calcium, etc.), Log dosing and maintenance, Reef tank Health Score, Animal and pest library, Controller integration

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReefCMD Pro — Monthly | $6.99 | per month |
| ReefCMD Pro — Annual | $69.99 | per year |


## Frequently asked questions

### Is Pool OS free?

Pool OS is free to download, with in-app purchases available.

### Is ReefCMD free?

ReefCMD is free to download, with in-app purchases available.

### Which has better reviews, Pool OS or ReefCMD?

Pool OS and ReefCMD are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do Pool OS or ReefCMD have ads?

Neither Pool OS nor ReefCMD shows ads.

### Which is updated more often, Pool OS or ReefCMD?

Pool OS ships an update every 2 weeks, and ReefCMD every 3 weeks. Most recently, Pool OS was updated on October 10, 2026 and ReefCMD on October 28, 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.*