HVAC Psych HD vs MSG View
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HVAC Psych HD
An interactive psychrometric chart application for iPad, allowing users to plot and customize HVAC processes. Save, email, and manage unlimited projects with both IP and SI units.
- Interactive psychrometric chart
- IP and SI unit support
- Customizable chart appearance
- Finger-based plotting and editing
- Save and email charts/data
- Unlimited project creation
- Zoom and pinch functionality
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The HVAC Psychrometric Chart app is the first truly interactive graphical psychrometric chart for the iPad, and it includes both IP and SI units. This app is now optimized for iOS 18.x. Using your finger, you can easily plot HVAC and other psychrometric processes on the iPad screen while you are out in the field, save the graphs, and then email the graph and results to yourself or clients. The HVAC Psych Chart app includes the following features and functionality: 1. Displays a fully customizable psychrometric chart in both landscape and portrait modes. 2. Allows you to customize the graph in many different ways including specifying the psychrometric chart line colors, chart background color, hide/display status of chart lines, point colors, process line colors, units of graph values, and the min/max limits of the chart. 3. Using your finger, you can plot as many points as you want on the screen. As you move your finger around the graph, the psychrometric properties at the top of the screen dynamically update . In addition, you can double-tap a point to display the point properties and then edit them. 4. Create psychrometric processes by plotting points then connecting them with process lines. Also, create custom labels anywhere on the chart. 5. After you have completed creating the chart, you can email a list of all the points and their properties along with a PDF of the chart, itself. 6. Create an unlimited number of psychrometric chart projects. Also, you can create templates that you can reuse over and over again. 7. Zoom in or out of the chart by "pinching" the iPad screen so as to view items in more detail. 8. Display sensible heat ratio (SHR) line 9. Display psych process line as curved along 100% RH line.
MSG View
Easily view Microsoft Outlook .msg files and their attachments directly on your iOS device. This app allows you to open saved emails from other applications, share attachments, or print them. You can also compose new emails using the content of your MSG files.
- Open .msg email files
- View email attachments
- Share attachments with other apps
- Print attachments
- Compose new emails from MSG content
- Open sample MSG files
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View Microsoft Outlook .MSG files on your iOS device, including attachments within them. These are usually emails saved in the Microsoft MSG format. Tap on an MSG file in another app, "Open In..." and select MSG View to view your saved email. You may tap "open a sample MSG" to see an example email open up. Attachments may be shared with other apps or printed. Tap the compose icon to open your MSG as a new Mail message
Screenshots
Verdict
The clearest difference is price: MSG View at $1.99 against HVAC Psych HD's $29.99. MSG View also leads on update cadence (every 4 months vs every 9 months). HVAC Psych HD's advantage is iOS requirement (13.0 vs 17.0). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
HVAC Psych HD costs $29.99 and MSG View $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
HVAC Psych HD ships an update every 9 months, MSG View every 4 months. The most recent releases landed on June 19, 2026 and September 17, 2026 respectively.
| Parameter | HVAC Psych HD | MSG View |
|---|---|---|
| Price | $29.99 | $1.99 — better |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| Update frequency | Every 9 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPad | iPhone, iPad — better |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 2 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Carmel Software Corporation | Matrix Logic Corporation |
Customer experience
HVAC Psych HD
MSG View
In-app purchases
HVAC Psych HD
No in-app purchases
MSG View
No in-app purchases
