# SMART Service Tool vs SATURNUS 20.20

The clearest difference is rating: SMART Service Tool at 3.4 against SATURNUS 20.20's 2.5. SMART Service Tool also leads on update cadence (every 3 weeks vs every 9 months) and ratings volume (21 vs 2). SATURNUS 20.20's advantage is iOS requirement (13.0 vs 26.0). 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.

SMART Service Tool holds the better App Store score, 3.4 against 2.5. That said, the two scores are not equally well evidenced: SMART Service Tool has 21 ratings behind it against 2, so its average is the more settled of the two.

SMART Service Tool ships an update every 3 weeks, SATURNUS 20.20 every 9 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SMART Service Tool | SATURNUS 20.20 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (21 ratings)](https://appshunter.io/ios/app/smart-service-tool/id918610107/reviews)** | [2.5 (2 ratings)](https://appshunter.io/ios/app/saturnus-2020/id1083403992/reviews) |
| Number of ratings | **21** | 2 |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 9 months |
| Monetization | Free | Free |
| Size | 62 MB | 54 MB |
| Requires iOS | 26.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rodrigo Miranda](https://appshunter.io/developer/1742641426) | [UNIFORM-Agri](https://appshunter.io/developer/906369827) |

## 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


### SATURNUS 20.20

[App page](https://appshunter.io/ios/app/saturnus-2020/id1083403992)

Access your management system remotely from your smartphone or tablet. Get a quick overview of important tasks, enter data easily, and receive notifications for alarms and activities. Stay informed about your herd's health and performance on the go.

**Highlights:** Remote system access, Quick overview of attentions, Fast data entry, Alarm notifications, Cow calendar management, Veterinary checklist, AMS performance tracking

**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 SATURNUS 20.20 free?

SATURNUS 20.20 is free to download, with no in-app purchases.

### Which has better reviews, SMART Service Tool or SATURNUS 20.20?

SMART Service Tool is rated higher. SMART Service Tool averages 3.4 out of 5 from 21 ratings, while SATURNUS 20.20 averages 2.5 from 2 ratings.

### Do SMART Service Tool or SATURNUS 20.20 have ads?

Neither SMART Service Tool nor SATURNUS 20.20 shows ads.

### Which is updated more often, SMART Service Tool or SATURNUS 20.20?

SMART Service Tool ships an update every 3 weeks, and SATURNUS 20.20 every 9 months. Most recently, SMART Service Tool was updated on October 26, 2026 and SATURNUS 20.20 on October 24, 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.*