# Ref Tools vs Wöhler Smart Inspection

The clearest difference is review sentiment: Ref Tools at 58% against Wöhler Smart Inspection's 0%. Ref Tools also leads on rating (3.9 vs 1.0) and update cadence (monthly vs every 15 months). Wöhler Smart Inspection's advantage is iOS requirement (13.0 vs 15.0). 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.

Ref Tools holds the better App Store score, 3.9 against 1.0. That said, the two scores are not equally well evidenced: Ref Tools has 52 ratings behind it against 2, 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 Wöhler Smart Inspection's.

Ref Tools ships an update monthly, Wöhler Smart Inspection every 15 months. The most recent releases landed on November 5, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Ref Tools | Wöhler Smart Inspection |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (52 ratings)](https://appshunter.io/ios/app/ref-tools/id472312541/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/wohler-smart-inspection/id6475716359/reviews) |
| Number of ratings | **52** | 2 |
| Positive reviews | **57.6% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 15 months |
| Monetization | Free | Free |
| Size | 98 MB | 65 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Danfoss A/S](https://appshunter.io/developer/423984644) | [Woehler Technik GmbH](https://appshunter.io/developer/959456679) |

## 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


### Wöhler Smart Inspection

[App page](https://appshunter.io/ios/app/wohler-smart-inspection/id6475716359)

Transform your mobile device into a control unit and display for Wöhler HD video endoscopes. Stream live video, capture images as JPGs, and record videos as AVIs directly to your device via a dedicated Wi-Fi network.

**Highlights:** Mobile control unit, HD video streaming, Image capture (JPG), Video recording (AVI), Dedicated Wi-Fi network connection

**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 Wöhler Smart Inspection free?

Wöhler Smart Inspection is free to download, with no in-app purchases.

### Which has better reviews, Ref Tools or Wöhler Smart Inspection?

Ref Tools is rated higher. Ref Tools averages 3.9 out of 5 from 52 ratings, while Wöhler Smart Inspection averages 1.0 from 2 ratings.

### Do Ref Tools or Wöhler Smart Inspection have ads?

Neither Ref Tools nor Wöhler Smart Inspection shows ads.

### Which is updated more often, Ref Tools or Wöhler Smart Inspection?

Ref Tools ships an update monthly, and Wöhler Smart Inspection every 15 months. Most recently, Ref Tools was updated on November 5, 2026 and Wöhler Smart Inspection on November 4, 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.*