# RTUBlue vs HVAC Master AI

The clearest difference is in-app purchases: RTUBlue at none against HVAC Master AI's 1. HVAC Master AI's advantage is update cadence (every 11 days vs every 5 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. HVAC Master AI sells 1 in-app purchase, starting at $4.99 per month. RTUBlue asks for nothing beyond the download.

RTUBlue ships an update every 5 months, HVAC Master AI every 11 days. The most recent releases landed on October 7, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | RTUBlue | HVAC Master AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/hvac-master-ai/id6738960643/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 11 days** |
| Monetization | — | Free with in-app purchases |
| Size | 57 MB | 159 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Enetics, Inc.](https://appshunter.io/developer/1778715029) | [alexis atilano](https://appshunter.io/developer/1783149667) |

## What reviewers say

### RTUBlue

[App page](https://appshunter.io/ios/app/rtublue/id6737986411)

**Features:** macOS Compatibility

**In-app purchases:** none


### HVAC Master AI

[App page](https://appshunter.io/ios/app/hvac-master-ai/id6738960643)

This mobile assistant helps HVAC technicians diagnose, repair, and optimize heating, ventilation, and air conditioning systems. It provides expert advice, refrigerant information, EPA 608 guidance, and heat pump insights for quick access to solutions.

**Highlights:** Comprehensive HVAC troubleshooting advice, Refrigerant expertise, EPA 608 compliance guidance, Heat pump system insights, Quick access to solutions

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly  Subscription | $4.99 | per month |


## Frequently asked questions

### Is RTUBlue free?

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

### Is HVAC Master AI free?

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

### Do RTUBlue or HVAC Master AI have ads?

Neither RTUBlue nor HVAC Master AI shows ads.

### Which is updated more often, RTUBlue or HVAC Master AI?

RTUBlue ships an update every 5 months, and HVAC Master AI every 11 days. Most recently, RTUBlue was updated on October 7, 2026 and HVAC Master AI on October 16, 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.*