# SmartThermo2 vs Sub

The clearest difference is rating: Sub at 4.4 against SmartThermo2's 2.4. Sub also leads on ratings volume (778 vs 8) and update cadence (every 5 weeks vs every 4 months). SmartThermo2's advantage is review sentiment (33% vs 15%) and monetization model (free vs ad-supported). On price, ads, in-app purchases and device support 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 8, so its average is the more settled of the two. Written reviews complicate that: 33% of SmartThermo2'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.

SmartThermo2 ships an update every 4 months, Sub every 5 weeks. The most recent releases landed on September 10, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | SmartThermo2 | Sub |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.4 (8 ratings)](https://appshunter.io/ios/app/smartthermo2/id1098143983/reviews) | **[4.4 (778 ratings)](https://appshunter.io/ios/app/sub-zero-group-owners-app/id1248991284/reviews)** |
| Number of ratings | 8 | **778** |
| Positive reviews | **33.3% of reviews** | 15.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 19 MB | 69 MB |
| Requires iOS | **8.0** | 15.5 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Fuzhou Emax Electronic Co.,Ltd](https://appshunter.io/developer/1128654625) | [Sub-Zero and Wolf](https://appshunter.io/developer/983988992) |

## What reviewers say

### SmartThermo2

[App page](https://appshunter.io/ios/app/smartthermo2/id1098143983)

This app simplifies grilling by allowing you to remotely monitor the internal temperature of your meat. Set your desired doneness for various meats and receive alerts when your food reaches the perfect temperature, making outdoor cooking easier.

**Highlights:** Remote meat temperature monitoring, Preset temperatures for 8 entrees, Customizable doneness settings, Alerts for perfect temperature, Bluetooth 4.0 connectivity, Backlight LCD display, Three operational modes

**Features:** Vision Pro support

**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 SmartThermo2 free?

SmartThermo2 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, SmartThermo2 or Sub?

Sub is rated higher. SmartThermo2 averages 2.4 out of 5 from 8 ratings, while Sub averages 4.4 from 778 ratings.

### Do SmartThermo2 or Sub have ads?

Neither SmartThermo2 nor Sub shows ads.

### Which is updated more often, SmartThermo2 or Sub?

SmartThermo2 ships an update every 4 months, and Sub every 5 weeks. Most recently, SmartThermo2 was updated on September 10, 2026 and Sub on September 20, 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.*