# HYDROS App vs OCTO aquatic

The clearest difference is review sentiment: HYDROS App at 62% against OCTO aquatic's 0%. HYDROS App also leads on rating (3.5 vs 1.0) and ratings volume (24 vs 2). OCTO aquatic's advantage is update cadence (monthly vs every 3 months) and iOS requirement (11.0 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, 3.5 against 1.0. That said, the two scores are not equally well evidenced: HYDROS App has 24 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 OCTO aquatic's.

HYDROS App ships an update every 3 months, OCTO aquatic monthly. The most recent releases landed on October 29, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | HYDROS App | OCTO aquatic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (24 ratings)](https://appshunter.io/ios/app/hydros-app/id1455344294/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/octo-aquatic/id1582293691/reviews) |
| Number of ratings | **24** | 2 |
| Positive reviews | **62.3% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free | Free |
| Size | 70 MB | 21 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Coralvue](https://appshunter.io/developer/1455344293) | [Honya Co.,Ltd](https://appshunter.io/developer/1582293693) |

## 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


### OCTO aquatic

[App page](https://appshunter.io/ios/app/octo-aquatic/id1582293691)

Control and connect to all OCTO WiFi-enabled products. This application enhances the user experience for managing your devices.

**Highlights:** Connect to OCTO WiFi products, Control OCTO WiFi products, Enhance device management, Seamless integration

**In-app purchases:** none


## Frequently asked questions

### Is HYDROS App free?

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

### Is OCTO aquatic free?

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

### Which has better reviews, HYDROS App or OCTO aquatic?

HYDROS App is rated higher. HYDROS App averages 3.5 out of 5 from 24 ratings, while OCTO aquatic averages 1.0 from 2 ratings.

### Do HYDROS App or OCTO aquatic have ads?

Neither HYDROS App nor OCTO aquatic shows ads.

### Which is updated more often, HYDROS App or OCTO aquatic?

HYDROS App ships an update every 3 months, and OCTO aquatic monthly. Most recently, HYDROS App was updated on October 29, 2026 and OCTO aquatic 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.*