# UEi DTHA2 vs Symphony Contractor Connect

The clearest difference is rating: Symphony Contractor Connect at 4.3 against UEi DTHA2's 4.0. Symphony Contractor Connect also leads on update cadence (every 6 weeks vs every 7 months). UEi DTHA2's advantage is iOS requirement (12.0 vs 15.0). On price, ratings volume, 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.

Symphony Contractor Connect holds the better App Store score, 4.3 against 4.0. Both are backed by a comparable volume of ratings — 4 and 3 respectively.

UEi DTHA2 ships an update every 7 months, Symphony Contractor Connect every 6 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | UEi DTHA2 | Symphony Contractor Connect |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/uei-dtha2/id1452986649/reviews) | **[4.3 (3 ratings)](https://appshunter.io/ios/app/symphony-contractor-connect/id1549973220/reviews)** |
| Number of ratings | **4** | 3 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 17 MB | 64 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kane Asia Inc.](https://appshunter.io/developer/1542732944) | [WaterFurnace International](https://appshunter.io/developer/940139733) |

## What reviewers say

### UEi DTHA2

[App page](https://appshunter.io/ios/app/uei-dtha2/id1452986649)

This app connects to a wireless adapter to measure airflow velocity, volumetric flow, temperature, and relative humidity. It allows adjustments for ducting and offers averaging options for readings.

**Highlights:** Measure airflow velocity, Measure volumetric flow, Measure temperature, Measure relative humidity, Adjust for ducting, Time or point averaging

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

**In-app purchases:** none


### Symphony Contractor Connect

[App page](https://appshunter.io/ios/app/symphony-contractor-connect/id1549973220)

Access WaterFurnace ground source heat pump data and troubleshooting tools. This application enhances the service technician's experience in assessing system performance and diagnosing component issues. It replaces the older AID Tool with an improved and more efficient interface.

**Highlights:** Ground source heat pump data access, System performance assessment, Component troubleshooting, Technical literature lookup, Troubleshooting video library, Replaces AID Tool

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is UEi DTHA2 free?

UEi DTHA2 is free to download, with no in-app purchases.

### Is Symphony Contractor Connect free?

Symphony Contractor Connect is free to download, with no in-app purchases.

### Which has better reviews, UEi DTHA2 or Symphony Contractor Connect?

Symphony Contractor Connect is rated higher. UEi DTHA2 averages 4.0 out of 5 from 4 ratings, while Symphony Contractor Connect averages 4.3 from 3 ratings.

### Do UEi DTHA2 or Symphony Contractor Connect have ads?

Neither UEi DTHA2 nor Symphony Contractor Connect shows ads.

### Which is updated more often, UEi DTHA2 or Symphony Contractor Connect?

UEi DTHA2 ships an update every 7 months, and Symphony Contractor Connect every 6 weeks. Most recently, UEi DTHA2 was updated on October 24, 2026 and Symphony Contractor Connect on October 24, 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.*