# Low vs HVAC AI

The clearest difference is in-app purchases: Low at none against HVAC AI's 4. Low also leads on update cadence (every 4 months vs every 12 months) and iOS requirement (11.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. HVAC AI sells 4 in-app purchases, starting at $5.69 per 7 days. Low asks for nothing beyond the download.

Low ships an update every 4 months, HVAC AI every 12 months. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Low | HVAC AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (2 ratings)](https://appshunter.io/ios/app/hvac-ai-tools-and-simulator/id6747603414/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 12 months |
| Monetization | — | Free with in-app purchases |
| Size | 53 MB | 390 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Danfoss A/S](https://appshunter.io/developer/423984644) | [RODRIGO DIAZ](https://appshunter.io/developer/1575990541) |

## What reviewers say

### Low

[App page](https://appshunter.io/ios/app/low-gwp-tool/id943412217)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### HVAC AI

[App page](https://appshunter.io/ios/app/hvac-ai-tools-and-simulator/id6747603414)

This app provides HVAC technicians with AI-powered diagnostic tools, a refrigerant slider, calculators, and a simulator. It helps diagnose faults, calculate values, and create professional quotes, all from a mobile device.

**Highlights:** AI-powered fault diagnosis, Digital refrigerant PT chart, Superheat and subcooling calculators, Interactive HVAC simulator, Gamified learning path, Professional quote builder, AI technical support

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Offer | $5.69 | per 7 days |
| Weekly | $5.69 | per 7 days |
| Annual Offer | $46.49 | per year |
| Annual Subscription | $57.90 | per year |


## Frequently asked questions

### Is Low free?

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

### Is HVAC AI free?

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

### Do Low or HVAC AI have ads?

Neither Low nor HVAC AI shows ads.

### Which is updated more often, Low or HVAC AI?

Low ships an update every 4 months, and HVAC AI every 12 months. Most recently, Low was updated on October 29, 2026 and HVAC AI on October 28, 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.*