# Windmill Pro vs Windmill Propane

The clearest difference is iOS requirement: Windmill Pro at 9.3 against Windmill Propane's 12.2. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Windmill Pro ships an update every 12 months, Windmill Propane every 23 months. The most recent releases landed on June 9, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | Windmill Pro | Windmill Propane |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (2 ratings)](https://appshunter.io/ios/app/windmill-pro/id1309388375/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 12 months** | Every 23 months |
| Monetization | Free | — |
| Size | 12 MB | 46 MB |
| Requires iOS | **9.3** | 12.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DIGISINE ENERGYTECH CO.,LTD.](https://appshunter.io/developer/1541781655) | [EDPO, LLC](https://appshunter.io/developer/1521548149) |

## What reviewers say

### Windmill Pro

[App page](https://appshunter.io/ios/app/windmill-pro/id1309388375)

Monitor your Automaxx Windmill wind turbines directly from your smartphone. Track operational data and status via Bluetooth, including voltage, charge levels, and generation metrics.

**Highlights:** Monitor wind turbine operation, Track functional data, View operating status, Bluetooth connectivity, Generating Voltage, Battery Charge Level Indicator, Brake/Unbrake control

**In-app purchases:** none


### Windmill Propane

[App page](https://appshunter.io/ios/app/windmill-propane/id1583996012)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Windmill Pro free?

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

### Is Windmill Propane free?

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

### Do Windmill Pro or Windmill Propane have ads?

Neither Windmill Pro nor Windmill Propane shows ads.

### Which is updated more often, Windmill Pro or Windmill Propane?

Windmill Pro ships an update every 12 months, and Windmill Propane every 23 months. Most recently, Windmill Pro was updated on June 9, 2026 and Windmill Propane on June 11, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*