# ULTRAPEN™ PTBTx™ vs Captain's Log @Life

The clearest difference is rating: Captain's Log @Life at 4.0 against ULTRAPEN™ PTBTx™'s 3.7. ULTRAPEN™ PTBTx™'s advantage is iOS requirement (15.0 vs 17.0). On price, review sentiment, ratings volume and update cadence there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Captain's Log @Life holds the better App Store score, 4.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

ULTRAPEN™ PTBTx™ ships an update every 5 months, Captain's Log @Life every 7 months. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | ULTRAPEN™ PTBTx™ | Captain's Log @Life |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/ultrapen-ptbtx/id885545007/reviews) | **[4.0 (2 ratings)](https://appshunter.io/ios/app/captains-log-life/id6476347589/reviews)** |
| Number of ratings | **3** | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 7 months |
| Monetization | Free | Free |
| Size | 9 MB | 58 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Myron L Company](https://appshunter.io/developer/885545010) | [Imago Software](https://appshunter.io/developer/572432488) |

## What reviewers say

### ULTRAPEN™ PTBTx™

[App page](https://appshunter.io/ios/app/ultrapen-ptbtx/id885545007)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


### Captain's Log @Life

[App page](https://appshunter.io/ios/app/captains-log-life/id6476347589)

This utility app allows users to record thoughts via text and voice memos, organizing them in a digital logbook. It also helps track daily goals with a simple list format.

**Highlights:** Text and voice memo recording, Organized logbook, Daily goal tracking, List-based goal management

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ULTRAPEN™ PTBTx™ free?

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

### Is Captain's Log @Life free?

Captain's Log @Life is free to download, with no in-app purchases.

### Which has better reviews, ULTRAPEN™ PTBTx™ or Captain's Log @Life?

Captain's Log @Life is rated higher. ULTRAPEN™ PTBTx™ averages 3.7 out of 5 from 3 ratings, while Captain's Log @Life averages 4.0 from 2 ratings.

### Do ULTRAPEN™ PTBTx™ or Captain's Log @Life have ads?

Neither ULTRAPEN™ PTBTx™ nor Captain's Log @Life shows ads.

### Which is updated more often, ULTRAPEN™ PTBTx™ or Captain's Log @Life?

ULTRAPEN™ PTBTx™ ships an update every 5 months, and Captain's Log @Life every 7 months. Most recently, ULTRAPEN™ PTBTx™ was updated on November 1, 2026 and Captain's Log @Life on November 4, 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.*