# WolfSense Mobile vs DOCS II

The clearest difference is update cadence: WolfSense Mobile at every 7 months against DOCS II's every 58 months. WolfSense Mobile also leads on ratings volume (3 vs 1) and iOS requirement (11.0 vs 15.0). On price, rating, 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.

On the App Store both sit at effectively the same score — 5.0 for WolfSense Mobile against 5.0 for DOCS II. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

WolfSense Mobile ships an update every 7 months, DOCS II every 58 months. The most recent releases landed on September 21, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | WolfSense Mobile | DOCS II |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/wolfsense-mobile/id1522804523/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/docs-ii/id1546600318/reviews) |
| Number of ratings | **3** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 58 months |
| Monetization | Free | Free |
| Size | 161 MB | 91 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GrayWolf Sensing Solutions, LLC](https://appshunter.io/developer/1478782810) | [Virtual Technology LLC](https://appshunter.io/developer/1546600320) |

## What reviewers say

### WolfSense Mobile

[App page](https://appshunter.io/ios/app/wolfsense-mobile/id1522804523)

This application connects GrayWolf DirectSense® II probes to iOS devices, transforming them into real-time displays and data loggers. It supports up to six plug-and-play gas sensors for various indoor air quality, industrial hygiene, and HVAC applications. Users can store logs, view trend graphs, and add multimedia notes to data files.

**Highlights:** Real-time display, Data logging, Supports multiple gas sensors, Trend graphing, Multimedia note integration, Cloud data access

**Features:** macOS Compatibility

**In-app purchases:** none


### DOCS II

[App page](https://appshunter.io/ios/app/docs-ii/id1546600318)

This app automates the capture and reporting of visible emission observations for air quality compliance. It uses location data, weather, and sun angles to document opacity levels, helping users avoid costly fines. The tool generates compliance archives for regulated sources.

**Highlights:** Automated Visible Emission Observation (VEO) capture, Integration with Google Maps, compass, and inclinometers, Real-time weather and sun angle data, Opacity level documentation, Automated VEO report generation, Compliance archive creation

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WolfSense Mobile free?

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

### Is DOCS II free?

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

### Which has better reviews, WolfSense Mobile or DOCS II?

WolfSense Mobile and DOCS II are both rated 5.0 out of 5 on the App Store, from 3 and 1 ratings respectively.

### Do WolfSense Mobile or DOCS II have ads?

Neither WolfSense Mobile nor DOCS II shows ads.

### Which is updated more often, WolfSense Mobile or DOCS II?

WolfSense Mobile ships an update every 7 months, and DOCS II every 58 months. Most recently, WolfSense Mobile was updated on September 21, 2026 and DOCS II on October 2, 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.*