# SMART Service Tool vs Diagnostic Tool

The clearest difference is rating: Diagnostic Tool at 5.0 against SMART Service Tool's 4.0. Diagnostic Tool also leads on review sentiment (100% vs 75%) and iOS requirement (11.0 vs 26.0). SMART Service Tool's advantage is update cadence (every 3 weeks vs every 5 months) and ratings volume (15 vs 4). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Diagnostic Tool holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 15 and 4 respectively. Written reviews point the same way: 75% of SMART Service Tool's written reviews are positive against 100% of Diagnostic Tool's.

SMART Service Tool ships an update every 3 weeks, Diagnostic Tool every 5 months. The most recent releases landed on September 22, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | SMART Service Tool | Diagnostic Tool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (15 ratings)](https://appshunter.io/ios/app/smart-service-tool/id918610107/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/diagnostic-tool/id1175329949/reviews)** |
| Number of ratings | **15** | 4 |
| Positive reviews | 75.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 months |
| Monetization | Free | Free |
| Size | 62 MB | 19 MB |
| Requires iOS | 26.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rodrigo Miranda](https://appshunter.io/developer/1742641426) | [Control Techniques Limited](https://appshunter.io/developer/577139804) |

## What reviewers say

### SMART Service Tool

[App page](https://appshunter.io/ios/app/smart-service-tool/id918610107)

This tool helps HVACR technicians quickly convert pressure to temperature and calculate superheat/subcooling using refrigerant data. It offers selectable units, customizable displays, and the ability to record and email data.

**Highlights:** Pressure to temperature conversion, Superheat and subcooling calculation, Selectable units of measure, Digital or analog display modes, Record and email data, Over 65 refrigerants supported

**In-app purchases:** none


### Diagnostic Tool

[App page](https://appshunter.io/ios/app/diagnostic-tool/id1175329949)

Quickly resolve error codes for Control Techniques' drives with this tool. It includes wiring diagrams for setup and fault finding, plus direct access to global technical support contact information.

**Highlights:** Error code lookup, Wiring diagrams, Fault finding assistance, Technical support contacts, Supported product list

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SMART Service Tool free?

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

### Is Diagnostic Tool free?

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

### Which has better reviews, SMART Service Tool or Diagnostic Tool?

Diagnostic Tool is rated higher. SMART Service Tool averages 4.0 out of 5 from 15 ratings, while Diagnostic Tool averages 5.0 from 4 ratings.

### Do SMART Service Tool or Diagnostic Tool have ads?

Neither SMART Service Tool nor Diagnostic Tool shows ads.

### Which is updated more often, SMART Service Tool or Diagnostic Tool?

SMART Service Tool ships an update every 3 weeks, and Diagnostic Tool every 5 months. Most recently, SMART Service Tool was updated on September 22, 2026 and Diagnostic Tool on October 16, 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.*