# Ref Tools vs Pipe Flow Gas Pipe Length

The clearest difference is rating: Pipe Flow Gas Pipe Length at 5.0 against Ref Tools's 3.9. Pipe Flow Gas Pipe Length also leads on update cadence (fortnightly vs monthly) and iOS requirement (11.0 vs 15.0). Ref Tools's advantage is in-app purchases (none vs 1) and ratings volume (52 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Pipe Flow Gas Pipe Length sells 1 one-off in-app purchase. Ref Tools asks for nothing beyond the download.

Pipe Flow Gas Pipe Length 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 1, so its average is the more settled of the two.

Ref Tools ships an update monthly, Pipe Flow Gas Pipe Length fortnightly. The most recent releases landed on October 23, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Ref Tools | Pipe Flow Gas Pipe Length |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (52 ratings)](https://appshunter.io/ios/app/ref-tools/id472312541/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pipe-flow-gas-pipe-length/id1582968409/reviews)** |
| Number of ratings | **52** | 1 |
| Positive reviews | 57.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 98 MB | 67 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Danfoss A/S](https://appshunter.io/developer/423984644) | [Pipe Flow Software](https://appshunter.io/developer/1193064957) |

## 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


### Pipe Flow Gas Pipe Length

[App page](https://appshunter.io/ios/app/pipe-flow-gas-pipe-length/id1582968409)

This app calculates the maximum pipe length for gas flow before pressure loss exceeds a specified rate. It offers comprehensive results, customizable databases for materials and fittings, and supports various units. Engineers can generate professional reports and verify calculations against published data.

**Highlights:** Maximum pipe length calculation, Friction loss and fitting loss analysis, Customizable databases for materials, fluids, and fittings, Imperial and Metric unit support, Professional Excel and PDF report generation, Results verification against published data

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pipe Flow Gas Pipe Length | $4.99 | one-time |


## Frequently asked questions

### Is Ref Tools free?

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

### Is Pipe Flow Gas Pipe Length free?

Pipe Flow Gas Pipe Length is free to download, with in-app purchases available.

### Which has better reviews, Ref Tools or Pipe Flow Gas Pipe Length?

Pipe Flow Gas Pipe Length is rated higher. Ref Tools averages 3.9 out of 5 from 52 ratings, while Pipe Flow Gas Pipe Length averages 5.0 from 1 ratings.

### Do Ref Tools or Pipe Flow Gas Pipe Length have ads?

Neither Ref Tools nor Pipe Flow Gas Pipe Length shows ads.

### Which is updated more often, Ref Tools or Pipe Flow Gas Pipe Length?

Ref Tools ships an update monthly, and Pipe Flow Gas Pipe Length fortnightly. Most recently, Ref Tools was updated on October 23, 2026 and Pipe Flow Gas Pipe Length on October 19, 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.*