# Ref Tools vs OneEvent

The clearest difference is rating: OneEvent at 5.0 against Ref Tools's 3.9. Ref Tools's advantage is ratings volume (52 vs 3). 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.

OneEvent 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 3, so its average is the more settled of the two.

Ref Tools ships an update every 5 weeks, OneEvent every 3 weeks. The most recent releases landed on October 7, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Ref Tools | OneEvent |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (52 ratings)](https://appshunter.io/ios/app/ref-tools/id472312541/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/oneevent/id1144170398/reviews)** |
| Number of ratings | **52** | 3 |
| Positive reviews | 57.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 98 MB | 275 MB |
| Requires iOS | 15.0 | **14.5** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Danfoss A/S](https://appshunter.io/developer/423984644) | [OneEvent Technologies Inc.](https://appshunter.io/developer/1144170397) |

## 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

**What reviewers like**

- 👍 Useful tool for HVAC/R techs
- 👍 Great idea for an app
- 👍 Best refrigeration and hvac app
- 👍 Useful App for HVACR
- 👍 Brilliant app

**What reviewers complain about**

- 🐛 Crashes instantly on launch
- 🐛 App won’t open on iPhone
- 🐛 Flashes up and disappears
- 🐛 Cannot open app
- 🐛 Immediately shuts off

**Reported bugs**

- CRASHED instantly on Mac Mini M4
- App won’t open on iPhone
- App flashes up and disappears
- Cannot open app
- Immediately shuts off since recent release

**Requested features**

- More residential AC information
- Troubleshooter for Residential & Commercial
- Add SP22 refrigerant
- Add R-11 refrigerant
- Add R-123 range down to 40 degrees


### OneEvent

[App page](https://appshunter.io/ios/app/oneevent/id1144170398)

Monitor your home, business, or commercial property in real-time from anywhere. Receive timely notifications for potential alarm or warning conditions based on predictive analytics. Manage your system remotely, view sensor readings, and add emergency contacts.

**Highlights:** Real-time property monitoring, Predictive analytic alerts, Remote arm/disarm functionality, Temperature and smoke level readings, Motion and entry activity tracking, Emergency contact management, Multi-user system access

**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 OneEvent free?

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

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

OneEvent is rated higher. Ref Tools averages 3.9 out of 5 from 52 ratings, while OneEvent averages 5.0 from 3 ratings.

### Do Ref Tools or OneEvent have ads?

Neither Ref Tools nor OneEvent shows ads.

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

Ref Tools ships an update every 5 weeks, and OneEvent every 3 weeks. Most recently, Ref Tools was updated on October 7, 2026 and OneEvent on September 22, 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.*