# WagnerSentry vs Dairy Ventilation

The clearest difference is rating: Dairy Ventilation at 5.0 against WagnerSentry's 4.0. Dairy Ventilation also leads on update cadence (every 2 weeks vs every 4 months). On price, ratings volume, 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.

Dairy Ventilation holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

WagnerSentry ships an update every 4 months, Dairy Ventilation every 2 weeks. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | WagnerSentry | Dairy Ventilation |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/wagnersentry/id1500322211/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/dairy-ventilation/id6767579932/reviews)** |
| Number of ratings | 2 | **4** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 26 MB | 27 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Wagner Electronic Products, Inc.](https://appshunter.io/developer/505076905) | [University of Wisconsin-Madison Shared Apps](https://appshunter.io/developer/908478605) |

## What reviewers say

### WagnerSentry

[App page](https://appshunter.io/ios/app/wagnersentry/id1500322211)

Monitor real-time temperature and humidity data from smart devices. View ambient and in-floor conditions simultaneously, receive alerts for custom thresholds, and download historical data for analysis and reporting.

**Highlights:** Real-time data viewing, Historical data download, Customizable alerts, Graph and list data views, Email report generation, Bluetooth connectivity

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

**In-app purchases:** none


### Dairy Ventilation

[App page](https://appshunter.io/ios/app/dairy-ventilation/id6767579932)

This tool helps dairy producers make informed decisions about managing heat stress and mechanical ventilation in barns. It calculates key metrics like the Temperature-Humidity Index and fan efficiency, aiding in system design and upgrades.

**Highlights:** Temperature-Humidity Index (THI) calculation with location-based weather, Fan sizing and selection for barns, Assessment of existing ventilation performance, Fan efficiency comparison, Payback period analysis for upgrades

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

**In-app purchases:** none


## Frequently asked questions

### Is WagnerSentry free?

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

### Is Dairy Ventilation free?

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

### Which has better reviews, WagnerSentry or Dairy Ventilation?

Dairy Ventilation is rated higher. WagnerSentry averages 4.0 out of 5 from 2 ratings, while Dairy Ventilation averages 5.0 from 4 ratings.

### Do WagnerSentry or Dairy Ventilation have ads?

Neither WagnerSentry nor Dairy Ventilation shows ads.

### Which is updated more often, WagnerSentry or Dairy Ventilation?

WagnerSentry ships an update every 4 months, and Dairy Ventilation every 2 weeks. Most recently, WagnerSentry was updated on October 24, 2026 and Dairy Ventilation on October 14, 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.*