# OWL VIS vs WindPower

The clearest difference is in-app purchases: OWL VIS at none against WindPower's 1. OWL VIS also leads on iOS requirement (12.0 vs 18). WindPower's advantage is update cadence (every 4 months vs every 33 months). On price, ads and device support there is nothing between them.

Both are free to download. WindPower sells 1 in-app purchase, starting at $2.99 per month. OWL VIS asks for nothing beyond the download.

OWL VIS ships an update every 33 months, WindPower every 4 months. The most recent releases landed on May 17, 2026 and June 8, 2026 respectively.

## The numbers

| Metric | OWL VIS | WindPower |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 33 months | **Every 4 months** |
| Monetization | — | Subscription |
| Size | 12 MB | 8 MB |
| Requires iOS | **12.0** | 18 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [SICEP S.r.l.](https://appshunter.io/developer/1017353302) | [Christian Schlee](https://appshunter.io/developer/1784094642) |

## What reviewers say

### OWL VIS

[App page](https://appshunter.io/ios/app/owl-vis/id1360230088)

**Features:** macOS Compatibility

**In-app purchases:** none


### WindPower

[App page](https://appshunter.io/ios/app/windpower-app/id6739182378)

This app provides technicians and professionals in the wind energy sector with direct oversight of wind turbines in Germany. It offers tools for searching turbines, detailed weather forecasts, documentation, and safety checks to simplify daily work.

**Highlights:** Search 37,000+ wind turbines, 14-day weather forecast per turbine, Favorites and search history, Photo documentation and safety checks, Last Minute Risk Analyses (LMRA), Nm converter, Nearby points of interest

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full access | $2.99 | per month |


## Frequently asked questions

### Is OWL VIS free?

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

### Is WindPower free?

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

### Do OWL VIS or WindPower have ads?

Neither OWL VIS nor WindPower shows ads.

### Which is updated more often, OWL VIS or WindPower?

OWL VIS ships an update every 33 months, and WindPower every 4 months. Most recently, OWL VIS was updated on May 17, 2026 and WindPower on June 8, 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.*