# Ref Tools vs AI Appliance Tech

The clearest difference is rating: AI Appliance Tech at 5.0 against Ref Tools's 3.9. AI Appliance Tech also leads on review sentiment (100% vs 58%) and update cadence (weekly vs every 5 weeks). Ref Tools's advantage is in-app purchases (none vs 2) and ratings volume (52 vs 5). On price, ads and iOS requirement there is nothing between them.

Both are free to download. AI Appliance Tech sells 2 in-app purchases, starting at $4.99 per 7 days. Ref Tools asks for nothing beyond the download.

AI Appliance Tech 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 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 100% of AI Appliance Tech's.

Ref Tools ships an update every 5 weeks, AI Appliance Tech weekly. The most recent releases landed on September 26, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Ref Tools | AI Appliance Tech |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (52 ratings)](https://appshunter.io/ios/app/ref-tools/id472312541/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/ai-appliance-tech/id6744376082/reviews)** |
| Number of ratings | **52** | 5 |
| Positive reviews | 57.6% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 98 MB | 42 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Danfoss A/S](https://appshunter.io/developer/423984644) | [Julius Elshada](https://appshunter.io/developer/1806171976) |

## 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


### AI Appliance Tech

[App page](https://appshunter.io/ios/app/ai-appliance-tech/id6744376082)

Get instant, expert repair help for your appliances without needing a service call. Simply input your appliance model and describe the issue to receive step-by-step, jargon-free instructions for troubleshooting and repair.

**Highlights:** Instant AI diagnosis, Step-by-step repair instructions, Appliance model number input, Problem description or common issue selection, Error code decoding, Support for washers and dryers

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $4.99 | per 7 days |
| Premium Monthly | $19.99 | per month |


## Frequently asked questions

### Is Ref Tools free?

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

### Is AI Appliance Tech free?

AI Appliance Tech is free to download, with in-app purchases available.

### Which has better reviews, Ref Tools or AI Appliance Tech?

AI Appliance Tech is rated higher. Ref Tools averages 3.9 out of 5 from 52 ratings, while AI Appliance Tech averages 5.0 from 5 ratings.

### Do Ref Tools or AI Appliance Tech have ads?

Neither Ref Tools nor AI Appliance Tech shows ads.

### Which is updated more often, Ref Tools or AI Appliance Tech?

Ref Tools ships an update every 5 weeks, and AI Appliance Tech weekly. Most recently, Ref Tools was updated on September 26, 2026 and AI Appliance Tech on September 12, 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.*