# Hanna Lab vs Sentry BLE

The clearest difference is update cadence: Sentry BLE at every 6 weeks against Hanna Lab's every 5 months. Sentry BLE also leads on iOS requirement (13.1 vs 15.0). On price, ads, in-app purchases and device support 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 ships an update every 5 months, Sentry BLE every 6 weeks. The most recent releases landed on October 24, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Hanna Lab | Sentry BLE |
| --- | --- | --- |
| Price | Free | Free |
| 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 6 weeks** |
| Monetization | Free | — |
| Size | 32 MB | 66 MB |
| Requires iOS | 15.0 | **13.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hanna Instruments, Inc.](https://appshunter.io/developer/913755816) | [Vision Metering](https://appshunter.io/developer/1567248925) |

## 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


### Sentry BLE

[App page](https://appshunter.io/ios/app/sentry-ble/id6752409845)

**In-app purchases:** none


## Frequently asked questions

### Is Hanna Lab free?

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

### Is Sentry BLE free?

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

### Do Hanna Lab or Sentry BLE have ads?

Neither Hanna Lab nor Sentry BLE shows ads.

### Which is updated more often, Hanna Lab or Sentry BLE?

Hanna Lab ships an update every 5 months, and Sentry BLE every 6 weeks. Most recently, Hanna Lab was updated on October 24, 2026 and Sentry BLE 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.*