Comparison

HVAC PT Chart vs XOi Vision

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

HVAC PT Chart

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
Read full description

HVAC PT Chart is an electronic pressure temperature calculator that allows HVAC technicians and contractors to quickly look up the temperature and corresponding pressure for 100+ common HVAC refrigerants including both bubble and dew versions of azeotropic (mixture) refrigerants. This is the only PT Chart app that allows you to email complete PT chart lists, refrigerant properties, and your inputted values/results. This is a unique PT Chart app for the following reasons: 1. Works on both the Apple iPhone and iPad (and adjusts its screen according to the mobile device screen size, whether you are running it on the iPhone 13 or the iPad) 2. Optimized for iOS 16 3. Includes 100+ refrigerants 4. Allows you to input the temperature and then the corresponding pressure will display and vice versa. 5. Allows you to also use a slider control to specify the exact pressure or temperature to see the corresponding temperature or pressure 6. Displays a list of pressure/temperature values in 1 degree increments 7. Allows you to select the atmospheric pressure so as to show the true pressure-temperature relationship even for high elevations 8. Includes a database of 1000+ cities world-wide with elevation data that is used to derive atmospheric pressure 9. Display common properties for the selected refrigerant (oil type, GWP, composition, critical temp, boiling temp, and more...) 10. Email project inputs and properties for the selected refrigerant 11. Email the full pressure/temperature list for the selected refrigerant 12. Display units in both English and Metric 13. Includes both dew and bubble versions of any azeotropic (mixture) refrigerants 14. This app now includes the HVAC Equipment Locator. Click here for details: http://bit.ly/1yTq539

About

XOi Vision

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
Read full description

Vision™ is a cloud-based software platform created to seamlessly enhance the normal routine of field service technicians. Through our software solution, techs can easily gather and share vital information with the customer and their team. Our cloud-based platform uses machine learning to simplify the identification and sharing of photos and videos captured in the field. Techs can access the input they need to get things done right the first time, build trust and transparency with customers, and clearly document their work. Vision™ can super-charge your existing Field Service Management Software or accelerate your business as a stand-alone solution.

Screenshots

HVAC PT Chart4 screens
XOi Vision4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
HVAC PT Chart versus XOi Vision: the parameters behind the verdict, then further details
ParameterHVAC PT ChartXOi Vision
PriceFreeFree
Rating4.0 (8 ratings) — better2.7 (113 ratings)
Positive reviews55.6% of reviews — better33.3% of reviews
Number of ratings8113 — better
Update frequencyEvery 4 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.1 — better16.0
Further details — not scored
Size27 MB222 MB
Age rating+44+
DeveloperCarmel Software CorporationXOEye Technologies, Inc.

Customer experience

HVAC PT Chart

All ratings8 ratings
Positive62.5%
Neutral25.0%
Negative12.5%
Written reviews9 reviews
Positive55.6%
Neutral33.3%
Negative11.1%

XOi Vision

All ratings112 ratings
Positive39.3%
Neutral8.0%
Negative52.7%
Written reviews27 reviews
Positive33.3%
Neutral7.4%
Negative59.3%

In-app purchases

2 purchases

HVAC PT Chart

One-time2
  • Banner Display Ad$0.99
  • HVAC Equipment Locator$9.99
None

XOi Vision

No in-app purchases

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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