ULTRAPEN™ PTBTx™ vs Bluemax
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ULTRAPEN™ PTBTx™
This application transforms your iOS device into a powerful water quality measurement tool when paired with specific pocket testers. It offers wireless data logging, calibration tracking, and exportable reports for various water parameters.
- Wireless communication with pocket testers
- Intuitive GUI for pairing and calibration
- On-board database for measurements
- Data export in .xls, .xlsx, .csv formats
- Automatic calibration records
- Supports conductivity, TDS, salinity, pH, ORP, and temperature
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REQUIRED EQUIPMENT: ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Myron L® Company ULTRAPEN PTBTX (First Generation Ultrapen; Lot Code Y1930 and earlier) Models: PTBT1; PTBT2 or PTBT3 DOES NOT WORK with Myron L® Company ULTRAPEN PTBTx2 (Second Generation; Lot Code Y1931 and later). INTRODUCTION ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ The ULTRAPEN PTBTX App is a GUI and communication application that, when paired with one of Myron L® Company's First generation ULTRAPEN 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 - Automatic records made of every calibration performed on each PTBTX2 pocket tester. WORKS WITH ULTRAPENX2 POCKET TESTERS ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ULTRAPEN PTBT1 (First Generation) - Measures Conductivity, Total Dissolved Solids (TDS), Salinity, and Temperature. ULTRAPEN PTBT2 (First Generation) - Measures pH and Temperature. Can be calibrated using 1, 2, and 3 point calibration options. ULTRAPEN PTBT3 (First Generation) - Measures Oxidation Reduction Potential (ORP) and Temperature. Can be calibrated to one of three different calibration points (80 mV, 260 mV, or 470 mV). The PTBT2 and the PTBT3 Include a sample and hold mode as well as a live measurements mode. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 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
Bluemax
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The BlueMax USA app is designed to work with their range of dynamometers in a range of utility applications.
Screenshots
Verdict
ULTRAPEN™ PTBTx™ and Bluemax are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
ULTRAPEN™ PTBTx™ ships an update every 5 months, Bluemax every 4 months. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.
| Parameter | ULTRAPEN™ PTBTx™ | Bluemax |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 5 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 9 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Myron L Company | Cyclops Marine Ltd |
In-app purchases
ULTRAPEN™ PTBTx™
No in-app purchases
Bluemax
No in-app purchases
Questions
Is ULTRAPEN™ PTBTx™ free?
Is Bluemax free?
Do ULTRAPEN™ PTBTx™ or Bluemax have ads?
Which is updated more often, ULTRAPEN™ PTBTx™ or Bluemax?
Other comparisons
