Engineering Cookbook vs PT Chart Refrigerants EU
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Engineering Cookbook
A handy reference guide for mechanical designers, offering quick access to essential information on fan basics, system and duct design, motors, heating, refrigeration, and conversion factors.
- Fan Basics
- System Design
- Duct Design
- Motors & Drives
- Heating & Refrigeration
- Formulas & Conversion Factors
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The Engineering Cookbook is a convenient reference guide for mechanical designers. It provides "fingertip" access to frequently needed information, including: • Fan Basics • System Design • Duct Design • Motors & Drives • Heating & Refrigeration • Formulas & Conversion Factors
PT Chart Refrigerants EU
This reference tool provides HVAC mechanics with a digital pressure-temperature (PT) chart. Users can select refrigerants to access necessary data and quickly calculate superheat and subcool averages directly from their iPhone or iPad.
- Digital pressure-temperature chart
- Refrigerant selection
- Field data access
- Superheat and subcool calculations
- Touchscreen interface
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HVAC mechanics have a new option when it comes to the standard paper pressure-temperature (PT) chart they currently carry. Honeywell offers a colorful display in which users can select a refrigerant and get all of the data they need to perform their tasks in the field. Using the touch screen, users can quickly calculate superheat and subcool averages to set a control from either their iPhone or iPad device.
Screenshots
Verdict
The clearest difference is rating: Engineering Cookbook at 4.5 against PT Chart Refrigerants EU's 3.7. PT Chart Refrigerants EU's advantage is update cadence (every 14 months vs every 34 months) and iOS requirement (11.0 vs 13.0). On price, ratings volume, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Engineering Cookbook holds the better App Store score, 4.5 against 3.7. Both are backed by a comparable volume of ratings — 6 and 3 respectively.
Engineering Cookbook ships an update every 34 months, PT Chart Refrigerants EU every 14 months. Both last shipped on November 6, 2026.
| Parameter | Engineering Cookbook | PT Chart Refrigerants EU |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (6 ratings) — better | 3.7 (3 ratings) |
| Positive reviews | 72.7% of reviews | — |
| Number of ratings | 6 — better | 3 |
| Update frequency | Every 34 months | Every 14 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 45 MB | 85 MB |
| Age rating | 4+ | 4+ |
| Developer | Loren Cook Company | Honeywell International, Inc. |
Customer experience
Engineering Cookbook
PT Chart Refrigerants EU
In-app purchases
Engineering Cookbook
No in-app purchases
PT Chart Refrigerants EU
No in-app purchases
