# GHL Connect vs HYDROS App

The clearest difference is review sentiment: HYDROS App at 62% against GHL Connect's 17%. HYDROS App also leads on ratings volume (23 vs 4). GHL Connect's advantage is rating (4.0 vs 3.6) and update cadence (every 3 weeks vs every 3 months). 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.

GHL Connect holds the better App Store score, 4.0 against 3.6. That said, the two scores are not equally well evidenced: HYDROS App has 23 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 17% of GHL Connect's written reviews are positive against 62% of HYDROS App's, so the app with the better star average is not the one people write more warmly about.

GHL Connect ships an update every 3 weeks, HYDROS App every 3 months. The most recent releases landed on October 16, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | GHL Connect | HYDROS App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/ghl-connect/id1295021795/reviews)** | [3.6 (23 ratings)](https://appshunter.io/ios/app/hydros-app/id1455344294/reviews) |
| Number of ratings | 4 | **23** |
| Positive reviews | 17.1% of reviews | **62.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Free | Free |
| Size | 57 MB | 70 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GHL Advanced Technology GmbH & Co. KG](https://appshunter.io/developer/613103787) | [Coralvue](https://appshunter.io/developer/1455344293) |

## What reviewers say

### GHL Connect

[App page](https://appshunter.io/ios/app/ghl-connect/id1295021795)

Easily monitor and configure aquarium devices like ProfiLux computers, Mitras LX 7 lights, and dosing pumps from your smartphone or tablet. Access your devices locally without internet or remotely via the myGHL cloud service.

**Highlights:** Monitor device status, Configure settings, Remote internet access, Local direct connection, Start special actions, Cloud storage for settings, Sensor chart history

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is GHL Connect free?

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

### Is HYDROS App free?

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

### Which has better reviews, GHL Connect or HYDROS App?

GHL Connect is rated higher. GHL Connect averages 4.0 out of 5 from 4 ratings, while HYDROS App averages 3.6 from 23 ratings.

### Do GHL Connect or HYDROS App have ads?

Neither GHL Connect nor HYDROS App shows ads.

### Which is updated more often, GHL Connect or HYDROS App?

GHL Connect ships an update every 3 weeks, and HYDROS App every 3 months. Most recently, GHL Connect was updated on October 16, 2026 and HYDROS App on October 22, 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.*