# Hanna Lab vs ReefAI3

The clearest difference is price: Hanna Lab at Free against ReefAI3's $1.99. ReefAI3's advantage is update cadence (every 2 days vs every 5 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Hanna Lab is free to download; ReefAI3 costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Hanna Lab ships an update every 5 months, ReefAI3 every 2 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Hanna Lab | ReefAI3 |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[3.7 (11 ratings)](https://appshunter.io/ios/app/hanna-lab/id913755813/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 45.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 days** |
| Monetization | Free | — |
| Size | 32 MB | 30 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hanna Instruments, Inc.](https://appshunter.io/developer/913755816) | [Austin Lamitina](https://appshunter.io/developer/1884142429) |

## 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


### ReefAI3

[App page](https://appshunter.io/ios/app/reefai3/id6764714629)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Hanna Lab free?

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

### Is ReefAI3 free?

ReefAI3 costs $1.99, with no in-app purchases.

### Do Hanna Lab or ReefAI3 have ads?

Neither Hanna Lab nor ReefAI3 shows ads.

### Which is updated more often, Hanna Lab or ReefAI3?

Hanna Lab ships an update every 5 months, and ReefAI3 every 2 days. Most recently, Hanna Lab was updated on October 24, 2026 and ReefAI3 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.*