# HYDROS App vs VSON

The clearest difference is review sentiment: HYDROS App at 62% against VSON's 0%. HYDROS App also leads on rating (3.7 vs 1.0) and ratings volume (22 vs 2). VSON's advantage is update cadence (every 6 weeks vs every 3 months) and iOS requirement (12.0 vs 15.6). 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.

HYDROS App holds the better App Store score, 3.7 against 1.0. That said, the two scores are not equally well evidenced: HYDROS App has 22 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 62% of HYDROS App's written reviews are positive against 0% of VSON's.

HYDROS App ships an update every 3 months, VSON every 6 weeks. The most recent releases landed on September 26, 2026 and August 24, 2026 respectively.

## The numbers

| Metric | HYDROS App | VSON |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (22 ratings)](https://appshunter.io/ios/app/hydros-app/id1455344294/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/vson/id1552169767/reviews) |
| Number of ratings | **22** | 2 |
| Positive reviews | **62.3% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 70 MB | 31 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Coralvue](https://appshunter.io/developer/1455344293) | [Vson Technology Co., Ltd](https://appshunter.io/developer/938010223) |

## 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


### VSON

[App page](https://appshunter.io/ios/app/vson/id1552169767)

This app connects your mobile device to smart home hardware for convenient management and monitoring. It allows for fast interaction with smart devices and provides real-time insights into your home environment.

**Highlights:** Smart hardware management, Mobile phone and smart device interaction, Interconnection between smart devices, Real-time device monitoring, Home environment monitoring

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

**In-app purchases:** none


## Frequently asked questions

### Is HYDROS App free?

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

### Is VSON free?

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

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

HYDROS App is rated higher. HYDROS App averages 3.7 out of 5 from 22 ratings, while VSON averages 1.0 from 2 ratings.

### Do HYDROS App or VSON have ads?

Neither HYDROS App nor VSON shows ads.

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

HYDROS App ships an update every 3 months, and VSON every 6 weeks. Most recently, HYDROS App was updated on September 26, 2026 and VSON on August 24, 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.*