# PTBTX2™ vs Sentron

The clearest difference is rating: PTBTX2™ at 5.0 against Sentron's 3.0. PTBTX2™ also leads on iOS requirement (13.0 vs 15.0). Sentron's advantage is update cadence (every 5 weeks vs every 15 months). On price, ratings volume, 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.

PTBTX2™ holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

PTBTX2™ ships an update every 15 months, Sentron every 5 weeks. The most recent releases landed on September 29, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | PTBTX2™ | Sentron |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ptbtx2/id1338848296/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/sentron/id1623135557/reviews) |
| Number of ratings | 1 | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 17 MB | 94 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Myron L Company](https://appshunter.io/developer/885545010) | [Sentron Europe B.V.](https://appshunter.io/developer/1623135559) |

## What reviewers say

### PTBTX2™

[App page](https://appshunter.io/ios/app/ptbtx2/id1338848296)

This application transforms your iOS device into a precise water quality measurement tool when paired with compatible pocket testers. It offers wireless connectivity, intuitive data recording, and exportable measurement logs for various water quality parameters.

**Highlights:** Wireless communication with pocket testers, Intuitive GUI for measurements, On-board database for data storage, Sortable, filterable, and exportable data, Automatic calibration records, Supports multiple water quality parameters

**Features:** macOS Compatibility

**In-app purchases:** none


### Sentron

[App page](https://appshunter.io/ios/app/sentron/id1623135557)

Transform your mobile device into a sophisticated pH meter. Connect wirelessly to specialized probes for accurate measurements in various applications. The app guides you through calibration, data logging, and export.

**Highlights:** Wireless pH/EC measurement, Bluetooth probe connectivity, Step-by-step calibration, Data logging and graphing, GPS data mapping, Automatic temperature compensation

**In-app purchases:** none


## Frequently asked questions

### Is PTBTX2™ free?

PTBTX2™ is free to download, with no in-app purchases.

### Is Sentron free?

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

### Which has better reviews, PTBTX2™ or Sentron?

PTBTX2™ is rated higher. PTBTX2™ averages 5.0 out of 5 from 1 ratings, while Sentron averages 3.0 from 2 ratings.

### Do PTBTX2™ or Sentron have ads?

Neither PTBTX2™ nor Sentron shows ads.

### Which is updated more often, PTBTX2™ or Sentron?

PTBTX2™ ships an update every 15 months, and Sentron every 5 weeks. Most recently, PTBTX2™ was updated on September 29, 2026 and Sentron on October 8, 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.*