# Psychro Calc Pro — HVAC Psychrometric Calculator

> HVAC Psychrometric Calculator (iPhone/iPad app by Mehmet Karakas.)

- Source: https://appshunter.io/ios/app/psychro-calc-pro/id6760909140 (this page in markdown: same URL + `.md`)
- Developer: [Mehmet Karakas](https://appshunter.io/developer/1886748581)
- Category: Productivity, Utilities
- Price: Free with in-app purchases (on sale, was $9.99)
- Age rating: 4+
- Requires: iOS 13.0 · 23 MB
- Languages: American English
- Released: 2026-03-24
- Data updated: 2026-07-16
- User reviews in markdown: https://appshunter.io/ios/app/psychro-calc-pro/id6760909140/reviews.md

## What is Psychro Calc Pro?

Psychro Calc Pro is a professional psychrometric calculator for HVAC engineers and technicians. Instantly calculate dry bulb, wet bulb, dew point, relative humidity, humidity ratio, enthalpy, and air density. Supports SI and Imperial units, PDF report generation with custom logo, and calculation history.

PREMIUM FEATURES
Unlock all calculations, process analysis, and PDF export with a one-time purchase of $9.99. No subscription, no recurring fees — pay once, use forever.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly Premium | $3.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Premium | $9.99 | one-time |



## Version history (last 5 releases)

### 1.0.13 — 2026-07-14

- Switched from monthly subscription to a one-time purchase. Unlock all features permanently with a single payment — no recurring fees.
- Existing premium users keep full access.
- Improved purchase and restore reliability.
- PDF report and chart rendering fixes.

### 1.0.12 — 2026-04-02

- Monthly subscription option with 3-day free trial
- Existing one-time purchasers retain full access automatically
- Bug fixes and performance improvements

### 1.0.10 — 2026-03-28

- Subscription system with 3-day free trial
- Full access to all psychrometric calculations
- PDF export and reporting
- Bug fixes and performance improvements

### 1.0.9 — 2026-03-26

- Premium subscription with 3-day free trial
- Monthly access to all psychrometric calculations and PDF export
- Bug fixes and performance improvements

### 1.0.8 — 2026-03-25

- Improved parameter display layout
- Updated app icon

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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 2026-07-16.*