# Ref Tools vs Sitrad

The clearest difference is review sentiment: Ref Tools at 58% against Sitrad's 0%. Ref Tools also leads on rating (3.9 vs 3.2) and ratings volume (52 vs 5). Sitrad's advantage is iOS requirement (12.0 vs 15.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Ref Tools holds the better App Store score, 3.9 against 3.2. That said, the two scores are not equally well evidenced: Ref Tools has 52 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 58% of Ref Tools's written reviews are positive against 0% of Sitrad's.

Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on September 19, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Ref Tools | Sitrad |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (52 ratings)](https://appshunter.io/ios/app/ref-tools/id472312541/reviews)** | [3.2 (5 ratings)](https://appshunter.io/ios/app/sitrad/id538790187/reviews) |
| Number of ratings | **52** | 5 |
| Positive reviews | **57.6% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | Every 6 weeks |
| Monetization | Free | Free |
| Size | 98 MB | 27 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Danfoss A/S](https://appshunter.io/developer/423984644) | [Full Gauge Controls](https://appshunter.io/developer/538790610) |

## What reviewers say

### Ref Tools

[App page](https://appshunter.io/ios/app/ref-tools/id472312541)

This app provides HVACR technicians with essential tools and information for field service. It includes refrigerant calculators, troubleshooting guides, product finders, and access to spare parts. Listen to educational podcasts to enhance your knowledge on the go.

**Highlights:** Refrigerant Slider for P/T calculations, Solenoid valve coil testing tool, Refrigeration system troubleshooting guide, Product data finder, Spare parts ordering, Low-GWP refrigerant comparison, TXV Superheat optimization, Educational podcasts

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

**In-app purchases:** none


### Sitrad

[App page](https://appshunter.io/ios/app/sitrad/id538790187)

Remotely manage and monitor industrial, commercial, and residential systems like cold rooms and air conditioning. Continuously evaluate, configure, and store data such as temperature and humidity, with the ability to modify parameters from anywhere via the internet.

**Highlights:** Remote system administration, Modify controller variables and functions, Monitor temperature, humidity, time, pressure, voltage, Generate graphs and reports, Receive warning messages, Manage unlimited control points

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

**In-app purchases:** none


## Frequently asked questions

### Is Ref Tools free?

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

### Is Sitrad free?

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

### Which has better reviews, Ref Tools or Sitrad?

Ref Tools is rated higher. Ref Tools averages 3.9 out of 5 from 52 ratings, while Sitrad averages 3.2 from 5 ratings.

### Do Ref Tools or Sitrad have ads?

Neither Ref Tools nor Sitrad shows ads.

### Which is updated more often, Ref Tools or Sitrad?

Ref Tools ships an update every 6 weeks, and Sitrad every 6 weeks. Most recently, Ref Tools was updated on September 19, 2026 and Sitrad on September 21, 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.*