# HYDROS App vs WCS Seed Sphere V2

The clearest difference is iOS requirement: WCS Seed Sphere V2 at 12.0 against HYDROS App's 15.6. On price, update cadence, 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 ships an update every 3 months, WCS Seed Sphere V2 every 2 months. The most recent releases landed on November 2, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | HYDROS App | WCS Seed Sphere V2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (24 ratings)](https://appshunter.io/ios/app/hydros-app/id1455344294/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 62.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 70 MB | 56 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) | [Wadsworth Control Systems, Inc.](https://appshunter.io/developer/1549248940) |

## 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


### WCS Seed Sphere V2

[App page](https://appshunter.io/ios/app/wcs-seed-sphere-v2/id1561250794)

**Features:** 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 WCS Seed Sphere V2 free?

WCS Seed Sphere V2 is free to download, with no in-app purchases.

### Do HYDROS App or WCS Seed Sphere V2 have ads?

Neither HYDROS App nor WCS Seed Sphere V2 shows ads.

### Which is updated more often, HYDROS App or WCS Seed Sphere V2?

HYDROS App ships an update every 3 months, and WCS Seed Sphere V2 every 2 months. Most recently, HYDROS App was updated on November 2, 2026 and WCS Seed Sphere V2 on October 27, 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.*