# Z Control vs Sub

The clearest difference is rating: Sub at 4.4 against Z Control's 2.4. Sub also leads on ratings volume (778 vs 67). Z Control's advantage is monetization model (free vs ad-supported) and review sentiment (23% vs 15%). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Sub holds the better App Store score, 4.4 against 2.4. That said, the two scores are not equally well evidenced: Sub has 778 ratings behind it against 67, so its average is the more settled of the two. Written reviews complicate that: 23% of Z Control's written reviews are positive against 15% of Sub's, so the app with the better star average is not the one people write more warmly about.

Z Control ships an update every 6 weeks, Sub every 5 weeks. The most recent releases landed on August 9, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Z Control | Sub |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.4 (67 ratings)](https://appshunter.io/ios/app/z-control/id1005899415/reviews) | **[4.4 (778 ratings)](https://appshunter.io/ios/app/sub-zero-group-owners-app/id1248991284/reviews)** |
| Number of ratings | 67 | **778** |
| Positive reviews | **23.3% of reviews** | 15.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 5 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 49 MB | 69 MB |
| Requires iOS | **12.2** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zoeller Company](https://appshunter.io/developer/957114302) | [Sub-Zero and Wolf](https://appshunter.io/developer/983988992) |

## What reviewers say

### Z Control

[App page](https://appshunter.io/ios/app/z-control/id1005899415)

Monitor and manage your property's flood protection systems remotely. Receive real-time alerts, test equipment, silence alarms, and customize settings for peace of mind.

**Highlights:** Real-time flood alerts, Remote equipment testing, Silence alarms, Manage preferences, Adjust settings, Monitor sump pump systems

**Features:** macOS Compatibility

**In-app purchases:** none


### Sub

[App page](https://appshunter.io/ios/app/sub-zero-group-owners-app/id1248991284)

This app enhances your kitchen experience by guiding you through recipes from websites and a curated collection. It allows remote control and monitoring of Sub-Zero refrigeration, Cove dishwashing, and Wolf appliances, ensuring optimal performance and convenience.

**Highlights:** Guided cooking from online recipes, Chef-tested recipes optimized for Wolf appliances, Remote dishwasher control and monitoring, Refrigerator settings and alerts, Filter recipes by cooking mode, Bookmark and share recipes

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Responsive and intuitive app
- 👍 Helpful notifications and alerts
- 🔒 Secure connection to appliances

**What reviewers complain about**

- 🐛 Frequent connection issues and disconnects
- 🔍 Lack of actual temperature monitoring
- 🤔 Confusing setup and pairing process
- 🔍 Missing key features like remote start

**Reported bugs**

- App crashes after recent updates
- Unable to log in or register account
- Appliances disappear from the app
- Firmware update failures brick appliances

**Requested features**

- Add support for Celsius temperature units
- Provide real-time temperature and energy consumption data
- Integrate with smart home platforms like Apple HomeKit


## Frequently asked questions

### Is Z Control free?

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

### Is Sub free?

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

### Which has better reviews, Z Control or Sub?

Sub is rated higher. Z Control averages 2.4 out of 5 from 67 ratings, while Sub averages 4.4 from 778 ratings.

### Do Z Control or Sub have ads?

Neither Z Control nor Sub shows ads.

### Which is updated more often, Z Control or Sub?

Z Control ships an update every 6 weeks, and Sub every 5 weeks. Most recently, Z Control was updated on August 9, 2026 and Sub on September 26, 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.*