# Dosing Pump 2 vs HYDROS App

The clearest difference is review sentiment: HYDROS App at 62% against Dosing Pump 2's 16%. HYDROS App also leads on rating (3.7 vs 1.0) and ratings volume (22 vs 2). Dosing Pump 2's advantage is update cadence (every 5 weeks 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, 3.7 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: 16% of Dosing Pump 2's written reviews are positive against 62% of HYDROS App's.

Dosing Pump 2 ships an update every 5 weeks, HYDROS App every 3 months. The most recent releases landed on June 2, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Dosing Pump 2 | HYDROS App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (2 ratings)](https://appshunter.io/ios/app/dosing-pump-2/id1247339419/reviews) | **[3.7 (22 ratings)](https://appshunter.io/ios/app/hydros-app/id1455344294/reviews)** |
| Number of ratings | 2 | **22** |
| Positive reviews | 15.8% of reviews | **62.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Monetization | Free | Free |
| Size | 15 MB | 70 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [KAMOER-fluid-tech-Shanghai-Co.,Ltd.](https://appshunter.io/developer/1080922922) | [Coralvue](https://appshunter.io/developer/1455344293) |

## What reviewers say

### Dosing Pump 2

[App page](https://appshunter.io/ios/app/dosing-pump-2/id1247339419)

Control your Kamoer X4 dosing pump with this dedicated aquarium breeding application. Monitor temperature with alarms, set automatic dosing schedules, manually adjust liquid levels, and view real-time liquid bottle status.

**Highlights:** Temperature monitoring with alarm thresholds, Automatic dosing parameter setting, Customizable dosing frequency and quantity, Manual dosing control and calibration, Real-time liquid level display

**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 Dosing Pump 2 free?

Dosing Pump 2 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, Dosing Pump 2 or HYDROS App?

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

### Do Dosing Pump 2 or HYDROS App have ads?

Neither Dosing Pump 2 nor HYDROS App shows ads.

### Which is updated more often, Dosing Pump 2 or HYDROS App?

Dosing Pump 2 ships an update every 5 weeks, and HYDROS App every 3 months. Most recently, Dosing Pump 2 was updated on June 2, 2026 and HYDROS App on September 26, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*