# HYDROS App vs FluvalConnect

The clearest difference is review sentiment: HYDROS App at 62% against FluvalConnect's 18%. HYDROS App also leads on rating (3.7 vs 2.2). FluvalConnect's advantage is update cadence (monthly vs every 3 months) and iOS requirement (13.0 vs 15.6). 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.

HYDROS App holds the better App Store score, 3.7 against 2.2. Both are backed by a comparable volume of ratings — 22 and 33 respectively. Written reviews point the same way: 62% of HYDROS App's written reviews are positive against 18% of FluvalConnect's.

HYDROS App ships an update every 3 months, FluvalConnect monthly. Both last shipped on September 26, 2026.

## The numbers

| Metric | HYDROS App | FluvalConnect |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (22 ratings)](https://appshunter.io/ios/app/hydros-app/id1455344294/reviews)** | [2.2 (33 ratings)](https://appshunter.io/ios/app/fluvalconnect/id6739331796/reviews) |
| Number of ratings | 22 | **33** |
| Positive reviews | **62.3% of reviews** | 17.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free | Free |
| Size | 70 MB | 73 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Coralvue](https://appshunter.io/developer/1455344293) | [Rolf C Hagen Inc.](https://appshunter.io/developer/1321403702) |

## 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


### FluvalConnect

[App page](https://appshunter.io/ios/app/fluvalconnect/id6739331796)

Control and customize your aquatic environment with this app. It allows for independent color channel adjustments, programmable light cycles, and preset environments for a captivating aquarium experience. Compatible with various Fluval LED lighting systems.

**Highlights:** Manual, Auto, and Pro operating modes, Independent color channel control, Programmable 24-hour light cycle, Preset environments, Dynamic effects, Multiple device control

**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 FluvalConnect free?

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

### Which has better reviews, HYDROS App or FluvalConnect?

HYDROS App is rated higher. HYDROS App averages 3.7 out of 5 from 22 ratings, while FluvalConnect averages 2.2 from 33 ratings.

### Do HYDROS App or FluvalConnect have ads?

Neither HYDROS App nor FluvalConnect shows ads.

### Which is updated more often, HYDROS App or FluvalConnect?

HYDROS App ships an update every 3 months, and FluvalConnect monthly. Most recently, HYDROS App was updated on September 26, 2026 and FluvalConnect on September 26, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*