PTBTX2™ vs TDSBot
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PTBTX2™
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.
- 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
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REQUIRED EQUIPMENT: ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Myron L® Company ULTRAPENX2™ (Second Generation Ultrapen) Models: PTBT1; PTBT2, PTBT3, PTBT4, PTBT5 & PTBT6 INTRODUCTION ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ The PTBTX2™ App is a GUI and communication application that, when paired with one of Myron L® Company's ULTRAPENX2 pocket testers, converts your iOS device into an accurate, reliable, fast and simple to use measurement and data storage device to use in diverse water quality applications. ADVANCED FEATURES INCLUDE: ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ - Wireless communication between the tester and your iOS device means no bothersome wires to interfere with quickly moving from sample to sample and the paired mobile device can be held safely away from the liquid samples being measured. - Intuitive GUI design for easily pairing, calibrating, measuring and recording measurements in the App on-board database. - The database can be sorted, filtered and exported via your devices email App as either .xls; .xlsx, .csv formatted attachments NOTE: The .csv export format may have render certain special characters (such as apostrophes or quotation marks) incorrectly when opened with some spreadsheet applications. - Automatic records made of every calibration performed on each PTBTX2™ pocket tester. WORKS WITH ULTRAPENX2™ POCKET TESTERS ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ULTRAPENX2™ PTBT1 – Measures Conductivity, Total Dissolved Solids (TDS), Salinity, and Temperature. ULTRAPENX2™ PTBT2 – Measures pH and Temperature. ULTRAPENX2™ PTBT3 – Measures Oxidation Reduction Potential (ORP) and Temperature. ULTRAPENX2™ PTBT4 – Measures Free Chlorine Equivalent (FCE) and Temperature. ULTRAPENX2™ PTBT5 – Measures Dissolved Oxygen (Concentration or Saturation) and Temperature. ULTRAPENX2™ PTBT6 – Measures Nitrate Concentration (nitrate or nitrate as nitrogen) and Temperature. The PTBT2 through the PTBT6 Include a sample and hold mode as well as a live measurements mode. Future ULTRAPENX2™ pocket testers will include measurement of Free Chlorine, Dissolved Oxygen and Nitrate. 1. Optimized for iOS 10 or later. 2. When operating on mobile devices running iOS 8 or 9 the PTBTX2™ App but may experience the following performance issues: - Difficulty making and maintaining wireless connections. - Transient on screen messaging errors during some measurements. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Myron L® is a registered trademark of the Myron L® Company, 2450 Impala Drive, Carlsbad CA, 92010-7226 Bluetooth® is a registered trademark of Bluetooth SIG
TDSBot
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TDSBot tracks incoming and purified water TDS (ppm), temperature, volume of water filtered and its flow rate in your reverse osmosis water filter system. It provides you with real time quality of water, total water filtered, and status of filter cartridges. It notifies you about water quality, leaks, blockage, abnormal temperature and predictive filter maintenance alerts so that you can proactively take action to ensure that your system runs efficiently and ensure good potable water always. Visualize system dashboard, device setup, configure alerts using the free app.
Screenshots
Verdict
The clearest difference is update cadence: TDSBot at every 2 months against PTBTX2™'s every 15 months. PTBTX2™'s advantage is iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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, TDSBot every 2 months. The most recent releases landed on September 29, 2026 and October 3, 2026 respectively.
| Parameter | PTBTX2™ | TDSBot |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 15 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 17 MB | 48 MB |
| Age rating | 4+ | 4+ |
| Developer | Myron L Company | WaterTDS Inc |
In-app purchases
PTBTX2™
No in-app purchases
TDSBot
No in-app purchases









