# ReefDoser vs Hanna Lab

The clearest difference is rating: Hanna Lab at 4.0 against ReefDoser's 1.0. Hanna Lab also leads on ratings volume (10 vs 1). ReefDoser's advantage is review sentiment (54% vs 45%) and iOS requirement (10.0 vs 15.0). On price, update cadence, 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.

Hanna Lab holds the better App Store score, 4.0 against 1.0. That said, the two scores are not equally well evidenced: Hanna Lab has 10 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 54% of ReefDoser's written reviews are positive against 45% of Hanna Lab's, so the app with the better star average is not the one people write more warmly about.

ReefDoser ships an update every 3 months, Hanna Lab every 5 months. The most recent releases landed on October 9, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | ReefDoser | Hanna Lab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/reefdoser/id353011315/reviews) | **[4.0 (10 ratings)](https://appshunter.io/ios/app/hanna-lab/id913755813/reviews)** |
| Number of ratings | 1 | **10** |
| Positive reviews | **54.2% of reviews** | 45.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | Free | Free |
| Size | 23 MB | 32 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Pixelwand Ltd](https://appshunter.io/developer/353011318) | [Hanna Instruments, Inc.](https://appshunter.io/developer/913755816) |

## What reviewers say

### ReefDoser

[App page](https://appshunter.io/ios/app/reefdoser/id353011315)

This app helps tropical marine aquarium owners calculate precise dosages for essential elements like Calcium, Magnesium, and Alkalinity. It features an extensive database of over 70 products to ensure optimal water parameters for your reef tank.

**Highlights:** Element dosage calculation, Calcium, Magnesium, Alkalinity tracking, Potassium, Iodine, Strontium, Boron, Silicate, Product database (70+ items), Tropical marine aquarium focus

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is ReefDoser free?

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

### Is Hanna Lab free?

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

### Which has better reviews, ReefDoser or Hanna Lab?

Hanna Lab is rated higher. ReefDoser averages 1.0 out of 5 from 1 ratings, while Hanna Lab averages 4.0 from 10 ratings.

### Do ReefDoser or Hanna Lab have ads?

Neither ReefDoser nor Hanna Lab shows ads.

### Which is updated more often, ReefDoser or Hanna Lab?

ReefDoser ships an update every 3 months, and Hanna Lab every 5 months. Most recently, ReefDoser was updated on October 9, 2026 and Hanna Lab on September 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.*