# True Pressure — Quick kTP calculator

> Quick kTP calculator (iPhone/iPad app by Howard Salmon.)

- Source: https://appshunter.io/ios/app/true-pressure/id6751648751 (this page in markdown: same URL + `.md`)
- Developer: [Howard Salmon](https://appshunter.io/developer/1836197988)
- Category: Utilities, Medical
- Price: $1.99
- Age rating: 4+
- Requires: iOS 16.6 · 1 MB
- Languages: American English
- Released: 2025-08-29
- Data updated: 2026-06-04
- User reviews in markdown: https://appshunter.io/ios/app/true-pressure/id6751648751/reviews.md

## What is True Pressure?

True Pressure gives medical physicists quick access to ambient temperature and barometric pressure to compute the ion-chamber temperature/pressure correction factor (kTP). The app can read on-device sensors (temperature read from paired probe if available, pressure via barometric sensor or network service when supported by device/region) and also supports manual entry. Values are displayed in common units (kPa, mmHg, inHg; °C/°F; meters/feet) and the kTP factor is calculated versus user-set reference conditions (e.g., 22 °C, 101.325 kPa).

Features
• Current temperature and atmospheric pressure (with unit conversions)  
• kTP calculation against configurable reference conditions  
• Manual input mode for labs without supported sensors  
• Dark Mode support and large, high-contrast readout

Important
This tool is intended for qualified users. It does not replace a calibrated thermometer or barometer and is not a medical device. Verify readings against your facility’s calibrated instruments before use in clinical QA or dosimetry.


## Version history (last 2 releases)

### 1.1 — 2025-09-02

•	Added full iPad support (all orientations, adaptive layout).
	•	Added option to enter temperature manually for P–T corrections.
	•	Increased mmHg display precision to two decimal places.

### 1.0 — 2025-08-30

No release notes.

## More apps by Howard Salmon

- [AudiobookCast](https://appshunter.io/ios/app/audiobookcast/id6755047116)

All apps by Howard Salmon: https://appshunter.io/developer/1836197988

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-04.*