# HYDROS App vs WolfSense Mobile

The clearest difference is rating: WolfSense Mobile at 5.0 against HYDROS App's 3.5. WolfSense Mobile also leads on iOS requirement (11.0 vs 15.6). HYDROS App's advantage is update cadence (every 3 months vs every 7 months) and ratings volume (24 vs 3). On price, ads, in-app purchases and monetization model there is nothing between them.

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

WolfSense Mobile holds the better App Store score, 5.0 against 3.5. That said, the two scores are not equally well evidenced: HYDROS App has 24 ratings behind it against 3, so its average is the more settled of the two.

HYDROS App ships an update every 3 months, WolfSense Mobile every 7 months. The most recent releases landed on November 2, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | HYDROS App | WolfSense Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (24 ratings)](https://appshunter.io/ios/app/hydros-app/id1455344294/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/wolfsense-mobile/id1522804523/reviews)** |
| Number of ratings | **24** | 3 |
| Positive reviews | 62.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 7 months |
| Monetization | Free | Free |
| Size | 70 MB | 161 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Coralvue](https://appshunter.io/developer/1455344293) | [GrayWolf Sensing Solutions, LLC](https://appshunter.io/developer/1478782810) |

## What reviewers say

### HYDROS App

[App page](https://appshunter.io/ios/app/hydros-app/id1455344294)

Easily monitor and control your aquarium's vital parameters like temperature, pH, and salinity. Manage all your connected devices, including ATOs, lights, and pumps, with a user-friendly interface. Quick setup with preset configurations means no coding is required to get your system running.

**Highlights:** Monitor temperature, ORP, pH, salinity, Control ATO, lights, heaters, pumps, User-friendly interface, Quick setup with presets, Manage multiple devices and aquariums, Set schedules and create modes

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is HYDROS App free?

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

### Is WolfSense Mobile free?

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

### Which has better reviews, HYDROS App or WolfSense Mobile?

WolfSense Mobile is rated higher. HYDROS App averages 3.5 out of 5 from 24 ratings, while WolfSense Mobile averages 5.0 from 3 ratings.

### Do HYDROS App or WolfSense Mobile have ads?

Neither HYDROS App nor WolfSense Mobile shows ads.

### Which is updated more often, HYDROS App or WolfSense Mobile?

HYDROS App ships an update every 3 months, and WolfSense Mobile every 7 months. Most recently, HYDROS App was updated on November 2, 2026 and WolfSense Mobile on October 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.*