# HVAC Psychrometric Plus vs MarkText

The clearest difference is in-app purchases: MarkText at none against HVAC Psychrometric Plus's 1. MarkText also leads on price ($3.99 vs $6.99) and iOS requirement (14.0 vs 17.0). HVAC Psychrometric Plus's advantage is review sentiment (73% vs 54%) and chart position (#182 vs unranked). On rating, ratings volume, update cadence and ads there is nothing between them.

HVAC Psychrometric Plus costs $6.99 and MarkText $3.99 up front. HVAC Psychrometric Plus sells 1 one-off in-app purchase. MarkText asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 3.0 for HVAC Psychrometric Plus against 3.0 for MarkText. Both are backed by a comparable volume of ratings — 2 and 3 respectively. Written reviews are what separate them: 73% of HVAC Psychrometric Plus's written reviews are positive against 54% of MarkText's.

HVAC Psychrometric Plus ships an update every 6 months, MarkText every 4 months. The most recent releases landed on November 10, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | HVAC Psychrometric Plus | MarkText |
| --- | --- | --- |
| Price | $6.99 | **$3.99** |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/hvac-psychrometric-plus/id348669031/reviews) | [3.0 (3 ratings)](https://appshunter.io/ios/app/marktext-markdown-editor/id948768793/reviews) |
| Number of ratings | 2 | **3** |
| Positive reviews | **72.7% of reviews** | 54.2% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 months** |
| Monetization | Paid | Paid |
| Best chart rank | **#182** | — |
| Size | 1 MB | 14 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | +4 | 4+ |
| Developer | [Carmel Software Corporation](https://appshunter.io/developer/317970398) | [刘生 林](https://appshunter.io/developer/948768792) |

## What reviewers say

### HVAC Psychrometric Plus

[App page](https://appshunter.io/ios/app/hvac-psychrometric-plus/id348669031)

**Currently charting:** #182 Top Paid · Productivity (US App Store)

Perform single-state and mixed-air psychrometric calculations quickly and easily. Select input parameters and view updated results on a single screen. Supports 23 input combinations and offers email/spreadsheet export.

**Highlights:** Single-state psychrometric calculations, Mixed-air psychrometric calculations, 23 input parameter combinations, Real-time result updates, Universal app for iPhone and iPad, Email and spreadsheet export

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HVAC Equipment Locator | $9.99 | one-time |


### MarkText

[App page](https://appshunter.io/ios/app/marktext-markdown-editor/id948768793)

This app is a markdown editor and note-taking tool for iOS devices. It offers real-time syntax highlighting, conversion to various formats like HTML, PNG, and PDF, and seamless syncing across Apple devices via iCloud Drive.

**Highlights:** Real-time markdown syntax highlighting, Convert notes to HTML, PNG, PDF, Share to Evernote, Dropbox, Email, iCloud Drive sync across devices, FlowChart & Diagrams support, LaTeX and MathML rendering

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is HVAC Psychrometric Plus free?

HVAC Psychrometric Plus costs $6.99, and also offers in-app purchases.

### Is MarkText free?

MarkText costs $3.99, with no in-app purchases.

### Which has better reviews, HVAC Psychrometric Plus or MarkText?

HVAC Psychrometric Plus and MarkText are both rated 3.0 out of 5 on the App Store, from 2 and 3 ratings respectively.

### Do HVAC Psychrometric Plus or MarkText have ads?

Neither HVAC Psychrometric Plus nor MarkText shows ads.

### Which is updated more often, HVAC Psychrometric Plus or MarkText?

HVAC Psychrometric Plus ships an update every 6 months, and MarkText every 4 months. Most recently, HVAC Psychrometric Plus was updated on November 10, 2026 and MarkText on November 6, 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.*