Refrigerant Selection Tool vs P
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Refrigerant Selection Tool
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It’s easy to find a Honeywell refrigerant to replace those being delisted by the U.S. EPA. With this app, we show you what’s available now to replace what’s going away, comparing products on important criteria to help you make the best decision for your needs. The app also features a built-in r calculator to help you determine how much new refrigerant you need to replace the old. The distributor locator shows you where you can buy Honeywell refrigerants in your area.
P
This tool simplifies HVAC/R technician tasks by calculating pressure/temperature relationships, superheat, and subcool. It automatically adjusts for altitude and offers English/Metric units. Easily access favorite refrigerants and supplementary information.
- Pressure/Temperature calculation
- Superheat/Subcool calculation
- Automatic altitude correction
- English/Metric units
- Favorite refrigerants list
- Refrigerant blend data
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This comprehensive Pressure/Temperature calculation tool from National Refrigerants provides several unique features designed to make the HVAC/R technician’s job easier. This app can calculate a simple pressure/temperature relationship or calculate superheat/subcool temperatures. The user can input pressure or temperature(s) on any screen and the other values are automatically calculated and displayed. For refrigerant blends, both saturated vapor and saturated liquid values are displayed. Within the superheat/subcool screen, a graphic display for blends will show the entering, mid-point, and outlet temperature as well as line temperature. Other features include: - Automatic altitude correction (if location services are enabled) - English/Metric units - Easily choose from “favorites” refrigerants list - Supplementary information about refrigerants and links to NRI website - Link to NRI Lubricant Cross Reference app - Link to NRI Branch Locator tool
Screenshots
Verdict
The clearest difference is iOS requirement: Refrigerant Selection Tool at 11.0 against P's 15.6. On price, update cadence, 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.
Both ship on a similar rhythm, roughly every 12 months. Both last shipped on November 2, 2026.
| Parameter | Refrigerant Selection Tool | P |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.8 (52 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 52 — better |
| Update frequency | Every 12 months | Every 12 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 108 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Honeywell International, Inc. | National Refrigerants Inc. |
In-app purchases
Refrigerant Selection Tool
No in-app purchases
P
No in-app purchases
