# ULTRAPEN™ PTBTx™ vs TF FPV

The clearest difference is update cadence: TF FPV at every 2 weeks against ULTRAPEN™ PTBTx™'s every 5 months. TF FPV also leads on iOS requirement (11.0 vs 15.0). 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.

ULTRAPEN™ PTBTx™ ships an update every 5 months, TF FPV every 2 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ULTRAPEN™ PTBTx™ | TF FPV |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/ultrapen-ptbtx/id885545007/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 9 MB | 123 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Myron L Company](https://appshunter.io/developer/885545010) | [Guangzhou Xingde Industrial Development Co., LTD](https://appshunter.io/developer/1711134292) |

## 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


### TF FPV

[App page](https://appshunter.io/ios/app/tf-fpv/id6468898337)

**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 TF FPV free?

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

### Do ULTRAPEN™ PTBTx™ or TF FPV have ads?

Neither ULTRAPEN™ PTBTx™ nor TF FPV shows ads.

### Which is updated more often, ULTRAPEN™ PTBTx™ or TF FPV?

ULTRAPEN™ PTBTx™ ships an update every 5 months, and TF FPV every 2 weeks. Most recently, ULTRAPEN™ PTBTx™ was updated on October 24, 2026 and TF FPV on October 25, 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.*