# Sub vs Boundary Plus Smart™ System

The clearest difference is rating: Sub at 4.4 against Boundary Plus Smart™ System's 2.4. Sub also leads on ratings volume (778 vs 97). Boundary Plus Smart™ System's advantage is monetization model (free vs ad-supported). On price, review sentiment, update cadence and ads 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 97, so its average is the more settled of the two. Written reviews point the same way: 15% of Sub's written reviews are positive against 12% of Boundary Plus Smart™ System's.

Sub ships an update every 5 weeks, Boundary Plus Smart™ System every 2 months. Both last shipped on October 17, 2026.

## The numbers

| Metric | Sub | Boundary Plus Smart™ System |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (778 ratings)](https://appshunter.io/ios/app/sub-zero-group-owners-app/id1248991284/reviews)** | [2.4 (97 ratings)](https://appshunter.io/ios/app/boundary-plus-smart-system/id1499004316/reviews) |
| Number of ratings | **778** | 97 |
| Positive reviews | **14.8% of reviews** | 11.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | Ad-supported | **Free** |
| Size | 69 MB | 26 MB |
| Requires iOS | 15.5 | **14.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sub-Zero and Wolf](https://appshunter.io/developer/983988992) | [Radio Systems Corporation](https://appshunter.io/developer/326173459) |

## What reviewers say

### 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


### Boundary Plus Smart™ System

[App page](https://appshunter.io/ios/app/boundary-plus-smart-system/id1499004316)

Manage your pet's containment system remotely. Set invisible boundaries and safe zones to keep your pet secure in the yard or specific areas. Receive real-time alerts and system status updates to ensure your pet's safety and independence.

**Highlights:** Set invisible boundaries, Define safe zones, Monitor boundary wire strength, Track device battery life, Check Wi-Fi connection, Receive system alerts, Control Smart Doorman™

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Sub free?

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

### Is Boundary Plus Smart™ System free?

Boundary Plus Smart™ System is free to download, with no in-app purchases.

### Which has better reviews, Sub or Boundary Plus Smart™ System?

Sub is rated higher. Sub averages 4.4 out of 5 from 778 ratings, while Boundary Plus Smart™ System averages 2.4 from 97 ratings.

### Do Sub or Boundary Plus Smart™ System have ads?

Neither Sub nor Boundary Plus Smart™ System shows ads.

### Which is updated more often, Sub or Boundary Plus Smart™ System?

Sub ships an update every 5 weeks, and Boundary Plus Smart™ System every 2 months. Most recently, Sub was updated on October 17, 2026 and Boundary Plus Smart™ System on October 17, 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.*