# HVAC PT Chart vs XOi Vision

The clearest difference is rating: HVAC PT Chart at 4.0 against XOi Vision's 2.7. HVAC PT Chart also leads on review sentiment (56% vs 33%) and iOS requirement (13.1 vs 16.0). XOi Vision's advantage is in-app purchases (none vs 2) and update cadence (every 3 weeks vs every 4 months). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. HVAC PT Chart sells 2 one-off in-app purchases. XOi Vision asks for nothing beyond the download.

HVAC PT Chart holds the better App Store score, 4.0 against 2.7. That said, the two scores are not equally well evidenced: XOi Vision has 113 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 56% of HVAC PT Chart's written reviews are positive against 33% of XOi Vision's.

HVAC PT Chart ships an update every 4 months, XOi Vision every 3 weeks. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | HVAC PT Chart | XOi Vision |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (8 ratings)](https://appshunter.io/ios/app/hvac-pt-chart/id508212589/reviews)** | [2.7 (113 ratings)](https://appshunter.io/ios/app/xoi-vision/id1436638483/reviews) |
| Number of ratings | 8 | **113** |
| Positive reviews | **55.6% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 27 MB | 222 MB |
| Requires iOS | **13.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [Carmel Software Corporation](https://appshunter.io/developer/317970398) | [XOEye Technologies, Inc.](https://appshunter.io/developer/1100846826) |

## What reviewers say

### HVAC PT Chart

[App page](https://appshunter.io/ios/app/hvac-pt-chart/id508212589)

This tool provides HVAC technicians with instant access to pressure and temperature data for over 100 refrigerants. It allows users to input one value to find the other, view detailed refrigerant properties, and email comprehensive charts and data.

**Highlights:** Pressure/temperature lookup for 100+ refrigerants, Input temperature to find pressure, or vice versa, Slider control for precise value selection, Email complete PT chart lists and refrigerant properties, Display common refrigerant properties, Adjust for atmospheric pressure based on city elevation, English and Metric unit options

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Banner Display Ad | $0.99 | one-time |
| HVAC Equipment Locator | $9.99 | one-time |


### XOi Vision

[App page](https://appshunter.io/ios/app/xoi-vision/id1436638483)

This cloud-based platform helps field service technicians efficiently collect and share critical job information. It uses machine learning to simplify photo and video documentation, enhancing transparency with customers and ensuring accurate work completion.

**Highlights:** Cloud-based platform, Machine learning for media identification, Seamless information sharing, Photo and video documentation, Customer transparency enhancement, Integration with Field Service Management Software

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

**In-app purchases:** none


## Frequently asked questions

### Is HVAC PT Chart free?

HVAC PT Chart is free to download, with in-app purchases available.

### Is XOi Vision free?

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

### Which has better reviews, HVAC PT Chart or XOi Vision?

HVAC PT Chart is rated higher. HVAC PT Chart averages 4.0 out of 5 from 8 ratings, while XOi Vision averages 2.7 from 113 ratings.

### Do HVAC PT Chart or XOi Vision have ads?

Neither HVAC PT Chart nor XOi Vision shows ads.

### Which is updated more often, HVAC PT Chart or XOi Vision?

HVAC PT Chart ships an update every 4 months, and XOi Vision every 3 weeks. Most recently, HVAC PT Chart was updated on November 1, 2026 and XOi Vision on November 2, 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.*