# Comfort Sync vs CORE Service

The clearest difference is rating: CORE Service at 3.6 against Comfort Sync's 1.7. CORE Service also leads on update cadence (every 3 months vs every 8 months). Comfort Sync's advantage is ratings volume (77 vs 19) and iOS requirement (6.0 vs 15.6). On price, review sentiment, 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.

CORE Service holds the better App Store score, 3.6 against 1.7. Both are backed by a comparable volume of ratings — 77 and 19 respectively. Written reviews complicate that: 5% of Comfort Sync's written reviews are positive against 0% of CORE Service's, so the app with the better star average is not the one people write more warmly about.

Comfort Sync ships an update every 8 months, CORE Service every 3 months. Both last shipped on October 7, 2026.

## The numbers

| Metric | Comfort Sync | CORE Service |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.7 (77 ratings)](https://appshunter.io/ios/app/comfort-sync/id618048454/reviews) | **[3.6 (19 ratings)](https://appshunter.io/ios/app/core-service/id1566612696/reviews)** |
| Number of ratings | **77** | 19 |
| Positive reviews | **4.6% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 12 MB | 47 MB |
| Requires iOS | **6.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Allied Air Enterprises inc.](https://appshunter.io/developer/618048457) | [Lennox Industries](https://appshunter.io/developer/355049651) |

## What reviewers say

### Comfort Sync

[App page](https://appshunter.io/ios/app/comfort-sync/id618048454)

Control your home's temperature remotely from your iOS device. Adjust heating and cooling settings, activate energy-saving modes, and ensure your home is comfortable before you arrive.

**Highlights:** Remote temperature adjustment, Select heating or cooling modes, Choose system programs, Energy-saving away mode, Fan control (always on/circulate)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### CORE Service

[App page](https://appshunter.io/ios/app/core-service/id1566612696)

This app provides a wireless interface for commercial HVAC technicians to control and service specific Lennox rooftop units. It offers guided setup, enhanced testing, and parameter configuration to streamline the service process.

**Highlights:** Wireless mobile service app, Guided setup with progress indicators, Enhanced test functionality, Real-time sensor readings and trending, Parameter configuration, Exportable setup summaries

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Comfort Sync free?

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

### Is CORE Service free?

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

### Which has better reviews, Comfort Sync or CORE Service?

CORE Service is rated higher. Comfort Sync averages 1.7 out of 5 from 77 ratings, while CORE Service averages 3.6 from 19 ratings.

### Do Comfort Sync or CORE Service have ads?

Neither Comfort Sync nor CORE Service shows ads.

### Which is updated more often, Comfort Sync or CORE Service?

Comfort Sync ships an update every 8 months, and CORE Service every 3 months. Most recently, Comfort Sync was updated on October 7, 2026 and CORE Service on October 7, 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.*