HVAC PT Chart vs Ctrldoc 2.0
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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 18 or the iPad) 2. Optimized for iOS 26 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
Ctrldoc 2.0
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Download the Ctrldoc app to manage and track and update your works. Ctrldoc is here to assist the construction and fire protection industries, with modules for Forms and digital forms, passive fire, defect management and more. The app allows you to take photos and update project records on site, saving you the hassle of preparing manual spreadsheets and documents for submissions.
Screenshots
Verdict
The clearest difference is in-app purchases: Ctrldoc 2.0 at none against HVAC PT Chart's 2. Ctrldoc 2.0 also leads on update cadence (fortnightly vs every 5 months). On price, ads, device support and iOS requirement 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
Both are free to download. HVAC PT Chart sells 2 one-off in-app purchases. Ctrldoc 2.0 asks for nothing beyond the download.
HVAC PT Chart ships an update every 5 months, Ctrldoc 2.0 fortnightly. The most recent releases landed on November 6, 2026 and November 12, 2026 respectively.
| Parameter | HVAC PT Chart | Ctrldoc 2.0 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (8 ratings) — better | — |
| Positive reviews | 55.6% of reviews | — |
| Number of ratings | 8 — better | — |
| Update frequency | Every 5 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 10 MB | 88 MB |
| Age rating | 4+ | 4+ |
| Developer | Carmel Software Corporation | Lattech Pty Ltd |
In-app purchases
HVAC PT Chart
- Banner Display Ad$0.99
- HVAC Equipment Locator$9.99
Ctrldoc 2.0
No in-app purchases
