# AQUA Dosing vs HYDROS App

The clearest difference is review sentiment: HYDROS App at 62% against AQUA Dosing's 44%. HYDROS App also leads on ratings volume (23 vs 6). AQUA Dosing's advantage is rating (3.8 vs 3.6) and update cadence (monthly vs every 3 months). 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.

AQUA Dosing holds the better App Store score, 3.8 against 3.6. Both are backed by a comparable volume of ratings — 6 and 23 respectively. Written reviews complicate that: 44% of AQUA Dosing's written reviews are positive against 62% of HYDROS App's, so the app with the better star average is not the one people write more warmly about.

AQUA Dosing ships an update monthly, HYDROS App every 3 months. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | AQUA Dosing | HYDROS App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (6 ratings)](https://appshunter.io/ios/app/aqua-dosing/id1193920950/reviews)** | [3.6 (23 ratings)](https://appshunter.io/ios/app/hydros-app/id1455344294/reviews) |
| Number of ratings | 6 | **23** |
| Positive reviews | 44.4% of reviews | **62.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Free | Free |
| Size | 8 MB | 70 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [华 李](https://appshunter.io/developer/1051208751) | [Coralvue](https://appshunter.io/developer/1455344293) |

## What reviewers say

### AQUA Dosing

[App page](https://appshunter.io/ios/app/aqua-dosing/id1193920950)

This app offers precise liquid dosing for aquariums with notifications and alarms. It features a user-friendly graphical interface for easy setup and includes an auto-alarm for low liquid levels.

**Highlights:** 1ML accuracy for liquid dosing, Notifications and alarms, 4 dosing channels, Graphical user interface, Auto-alarm for low liquid

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is AQUA Dosing free?

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

### Is HYDROS App free?

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

### Which has better reviews, AQUA Dosing or HYDROS App?

AQUA Dosing is rated higher. AQUA Dosing averages 3.8 out of 5 from 6 ratings, while HYDROS App averages 3.6 from 23 ratings.

### Do AQUA Dosing or HYDROS App have ads?

Neither AQUA Dosing nor HYDROS App shows ads.

### Which is updated more often, AQUA Dosing or HYDROS App?

AQUA Dosing ships an update monthly, and HYDROS App every 3 months. Most recently, AQUA Dosing was updated on October 24, 2026 and HYDROS App on October 22, 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.*