# Ref Tools vs Symmons Evolution

The clearest difference is rating: Symmons Evolution at 5.0 against Ref Tools's 3.9. Symmons Evolution also leads on review sentiment (100% vs 58%). Ref Tools's advantage is ratings volume (52 vs 8). 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.

Symmons Evolution holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Ref Tools has 52 ratings behind it against 8, 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 100% of Symmons Evolution's.

Ref Tools ships an update every 5 weeks, Symmons Evolution every 3 weeks. The most recent releases landed on September 26, 2026 and August 6, 2026 respectively.

## The numbers

| Metric | Ref Tools | Symmons Evolution |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (52 ratings)](https://appshunter.io/ios/app/ref-tools/id472312541/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/symmons-evolution/id1461251751/reviews)** |
| Number of ratings | **52** | 8 |
| Positive reviews | 57.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 98 MB | 89 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Danfoss A/S](https://appshunter.io/developer/423984644) | [Symmons](https://appshunter.io/developer/1461251351) |

## 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


### Symmons Evolution

[App page](https://appshunter.io/ios/app/symmons-evolution/id1461251751)

Gain complete control and visibility over your building's water systems. Receive real-time alerts for issues, manage tasks, and track water savings. This app streamlines operations and promotes sustainability for facility managers.

**Highlights:** Real-time monitoring and alerts, Centralized action center for tasks, Dashboard insights and water savings tracking, On-site device management, AI-powered insights and recommendations, Multi-user management, Customizable notifications

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ref Tools free?

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

### Is Symmons Evolution free?

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

### Which has better reviews, Ref Tools or Symmons Evolution?

Symmons Evolution is rated higher. Ref Tools averages 3.9 out of 5 from 52 ratings, while Symmons Evolution averages 5.0 from 8 ratings.

### Do Ref Tools or Symmons Evolution have ads?

Neither Ref Tools nor Symmons Evolution shows ads.

### Which is updated more often, Ref Tools or Symmons Evolution?

Ref Tools ships an update every 5 weeks, and Symmons Evolution every 3 weeks. Most recently, Ref Tools was updated on September 26, 2026 and Symmons Evolution on August 6, 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.*