# Flux HVAC vs PlainAuto

The clearest difference is in-app purchases: Flux HVAC at none against PlainAuto's 3. Flux HVAC also leads on iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. PlainAuto sells 3 one-off in-app purchases. Flux HVAC asks for nothing beyond the download.

## The numbers

| Metric | Flux HVAC | PlainAuto |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/flux-hvac-tech-calculator/id6756405485/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Monetization | Free | — |
| Size | 38 MB | 5 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [华 陆](https://appshunter.io/developer/1589633448) | [Bhim Upadhyaya](https://appshunter.io/developer/1886342738) |

## What reviewers say

### Flux HVAC

[App page](https://appshunter.io/ios/app/flux-hvac-tech-calculator/id6756405485)

This professional toolkit helps HVAC technicians diagnose issues, charge systems accurately, and validate work with essential calculators. It offers offline functionality for superheat, subcooling, duct sizing, system performance, psychrometrics, and capacitor testing.

**Highlights:** Superheat and Subcooling Calculators, Duct Sizing with Visualizer, System Performance (BTU/Ton) Calculation, Psychrometric Calculations (RH%, Dew Point), Capacitor Test (Under Load), 100% Offline Functionality

**Features:** macOS Compatibility

**In-app purchases:** none


### PlainAuto

[App page](https://appshunter.io/ios/app/plainauto/id6768851056)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Owner Premium | $4.99 | one-time |
| Pro Unlock | $9.99 | one-time |
| Complete Bundle | $12.99 | one-time |


## Frequently asked questions

### Is Flux HVAC free?

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

### Is PlainAuto free?

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

### Do Flux HVAC or PlainAuto have ads?

Neither Flux HVAC nor PlainAuto shows ads.

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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.*