# Optsy Mobile vs CORE Service

The clearest difference is rating: CORE Service at 3.6 against Optsy Mobile's 3.0. Optsy Mobile's advantage is review sentiment (20% vs 0%) and iOS requirement (13.0 vs 15.6). On price, ratings volume, 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.

CORE Service holds the better App Store score, 3.6 against 3.0. Both are backed by a comparable volume of ratings — 9 and 19 respectively. Written reviews complicate that: 20% of Optsy Mobile'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.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 17, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Optsy Mobile | CORE Service |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (9 ratings)](https://appshunter.io/ios/app/optsy-mobile/id477793283/reviews) | **[3.6 (19 ratings)](https://appshunter.io/ios/app/core-service/id1566612696/reviews)** |
| Number of ratings | 9 | **19** |
| Positive reviews | **20.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free | Free |
| Size | 27 MB | 47 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Optsy LLC](https://appshunter.io/developer/1067335399) | [Lennox Industries](https://appshunter.io/developer/355049651) |

## What reviewers say

### Optsy Mobile

[App page](https://appshunter.io/ios/app/optsy-mobile/id477793283)

This field service management app helps technicians in the field efficiently manage their schedules, work orders, and customer interactions. It allows for real-time updates, offline functionality, and direct communication with customers and contacts.

**Highlights:** View and update schedules, Record work order status changes, Track time-in/time-out, Update labor and invoice details, Record materials used and add attachments, Capture customer signatures, Offline functionality

**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 Optsy Mobile free?

Optsy Mobile 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, Optsy Mobile or CORE Service?

CORE Service is rated higher. Optsy Mobile averages 3.0 out of 5 from 9 ratings, while CORE Service averages 3.6 from 19 ratings.

### Do Optsy Mobile or CORE Service have ads?

Neither Optsy Mobile nor CORE Service shows ads.

### Which is updated more often, Optsy Mobile or CORE Service?

Optsy Mobile ships an update every 3 months, and CORE Service every 3 months. Most recently, Optsy Mobile was updated on October 17, 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.*