# SMART Pro/R Service Tool vs D

The clearest difference is update cadence: SMART Pro/R Service Tool at every 6 weeks against D's every 5 months. D's advantage is iOS requirement (15.1 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SMART Pro/R Service Tool ships an update every 6 weeks, D every 5 months. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | SMART Pro/R Service Tool | D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.5 (24 ratings)](https://appshunter.io/ios/app/smart-pror-service-tool/id1067668522/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 11.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 5 months |
| Monetization | Free | — |
| Size | 62 MB | 23 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Parker Hannifin Corporation](https://appshunter.io/developer/491113305) | [INFICON](https://appshunter.io/developer/901401219) |

## What reviewers say

### SMART Pro/R Service Tool

[App page](https://appshunter.io/ios/app/smart-pror-service-tool/id1067668522)

This tool helps HVACR technicians quickly calculate superheat and subcooling using embedded refrigerant data and Bluetooth sensors. It allows for data recording, custom PDF report generation, and sharing of findings.

**Highlights:** Temperature and pressure difference calculation, Superheat and subcooling calculation, Embedded refrigerant data, Record data and generate PDF reports, Customizable display and selectable units, Over 115 refrigerants supported

**In-app purchases:** none


### D

[App page](https://appshunter.io/ios/app/d-tek-pro/id6749635092)

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

**In-app purchases:** none


## Frequently asked questions

### Is SMART Pro/R Service Tool free?

SMART Pro/R Service Tool is free to download, with no in-app purchases.

### Is D free?

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

### Do SMART Pro/R Service Tool or D have ads?

Neither SMART Pro/R Service Tool nor D shows ads.

### Which is updated more often, SMART Pro/R Service Tool or D?

SMART Pro/R Service Tool ships an update every 6 weeks, and D every 5 months. Most recently, SMART Pro/R Service Tool was updated on October 24, 2026 and D on October 12, 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.*