# HYDROS App vs Kactoily

The clearest difference is rating: HYDROS App at 3.6 against Kactoily's 2.5. HYDROS App also leads on review sentiment (62% vs 25%). Kactoily's advantage is update cadence (every 9 days vs every 3 months) and iOS requirement (13 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, 3.6 against 2.5. Both are backed by a comparable volume of ratings — 23 and 11 respectively. Written reviews point the same way: 62% of HYDROS App's written reviews are positive against 25% of Kactoily's.

HYDROS App ships an update every 3 months, Kactoily every 9 days. The most recent releases landed on October 22, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | HYDROS App | Kactoily |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (23 ratings)](https://appshunter.io/ios/app/hydros-app/id1455344294/reviews)** | [2.5 (11 ratings)](https://appshunter.io/ios/app/kactoily/id6744716298/reviews) |
| Number of ratings | **23** | 11 |
| Positive reviews | **62.3% of reviews** | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 9 days** |
| Monetization | Free | Free |
| Size | 70 MB | 62 MB |
| Requires iOS | 15.6 | **13** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Coralvue](https://appshunter.io/developer/1455344293) | [彦浩 宋](https://appshunter.io/developer/1808803601) |

## 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


### Kactoily

[App page](https://appshunter.io/ios/app/kactoily/id6744716298)

This app monitors water quality for pools, aquariums, and other water bodies. It helps users track key parameters to ensure optimal conditions. The application provides essential data for maintaining healthy aquatic environments.

**Highlights:** Water quality monitoring, Pool monitoring, Aquarium monitoring, Data tracking, Environmental maintenance

**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 Kactoily free?

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

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

HYDROS App is rated higher. HYDROS App averages 3.6 out of 5 from 23 ratings, while Kactoily averages 2.5 from 11 ratings.

### Do HYDROS App or Kactoily have ads?

Neither HYDROS App nor Kactoily shows ads.

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

HYDROS App ships an update every 3 months, and Kactoily every 9 days. Most recently, HYDROS App was updated on October 22, 2026 and Kactoily on October 25, 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.*