# PTBTX2™ vs RRTool

The clearest difference is update cadence: RRTool at every 4 months against PTBTX2™'s every 15 months. 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.

PTBTX2™ ships an update every 15 months, RRTool every 4 months. The most recent releases landed on September 29, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | PTBTX2™ | RRTool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ptbtx2/id1338848296/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 4 months** |
| Monetization | Free | — |
| Size | 17 MB | 5 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Myron L Company](https://appshunter.io/developer/885545010) | [Bay Area Instruments Inc.](https://appshunter.io/developer/1649065401) |

## 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


### RRTool

[App page](https://appshunter.io/ios/app/rrtool/id6443753484)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PTBTX2™ free?

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

### Is RRTool free?

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

### Do PTBTX2™ or RRTool have ads?

Neither PTBTX2™ nor RRTool shows ads.

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

PTBTX2™ ships an update every 15 months, and RRTool every 4 months. Most recently, PTBTX2™ was updated on September 29, 2026 and RRTool on October 3, 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.*