# Hanna Lab vs HYDROS App

Hanna Lab and HYDROS App both sit at 4.0 stars, but that hides the real split: 64% of HYDROS App's written reviews are positive against 45% of Hanna Lab's. On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.0 for Hanna Lab against 4.1 for HYDROS App. Both are backed by a comparable volume of ratings — 10 and 17 respectively. Written reviews are what separate them: 45% of Hanna Lab's written reviews are positive against 64% of HYDROS App's.

Hanna Lab ships an update every 5 months, HYDROS App every 3 months. The most recent releases landed on August 2, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Hanna Lab | HYDROS App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (10 ratings)](https://appshunter.io/ios/app/hanna-lab/id913755813/reviews) | **[4.1 (17 ratings)](https://appshunter.io/ios/app/hydros-app/id1455344294/reviews)** |
| Number of ratings | 10 | **17** |
| Positive reviews | 45.5% of reviews | **63.5% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 32 MB | 69 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hanna Instruments, Inc.](https://appshunter.io/developer/913755816) | [CV Industries LLC](https://appshunter.io/developer/1455344293) |

## What reviewers say

### Hanna Lab

[App page](https://appshunter.io/ios/app/hanna-lab/id913755813)

Transform your mobile device into a professional-grade pH meter or data management system. Connect with compatible Hanna Instruments probes and meters to conduct precise measurements, store data securely, and access it via the cloud.

**Highlights:** pH meter functionality with Bluetooth probes, Data management with compatible meters, Hanna Cloud compatibility for data sync, Live measurements and trend graphs, Data export in PDF and CSV formats, Calibration and logging features

**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

**In-app purchases:** none


## Frequently asked questions

### Is Hanna Lab free?

Hanna Lab 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, Hanna Lab or HYDROS App?

HYDROS App is rated higher. Hanna Lab averages 4.0 out of 5 from 10 ratings, while HYDROS App averages 4.1 from 17 ratings.

### Do Hanna Lab or HYDROS App have ads?

Neither Hanna Lab nor HYDROS App shows ads.

### Which is updated more often, Hanna Lab or HYDROS App?

Hanna Lab ships an update every 5 months, and HYDROS App every 3 months. Most recently, Hanna Lab was updated on August 2, 2026 and HYDROS App on September 16, 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.*