HVAC Load Plus vs Shapr 3D CAD modeling
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HVAC Load Plus
Perform detailed heating and cooling load calculations for buildings in the field using your iPhone. Access a vast weather database and construction data to generate comprehensive reports that can be emailed or exported to spreadsheets.
- Detailed heating and cooling load calculations
- 1000+ city weather database
- Extensive construction type data
- Unlimited project creation and storage
- Comprehensive load breakdown reports
- Emailable HTML reports with spreadsheet attachments
- Company information display on reports
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The HVAC Load+ iPhone app allows you to perform detailed heating and cooling block loads for small commercial and residential buildings out in the field by taking advantage of the simplicity and power of the iPhone. It performs heating and cooling block load calculations based upon industry standard calculation methods. The following is just a small sample of the features included in this app: 1. Includes a 1000+ world-wide city weather database 2. Includes data for 100s of construction types for walls, roofs, floors, doors, windows, skylights, ceilings, and more 3. Allows you to create and store an unlimited number of projects. You can also copy existing projects to new projects for easy reuse of data 4. Allows you to specify an unlimited # of opaque types (ie – doors, walls, roofs, floors, ceilings), window types, and skylight types for each building 5. Allows you to view comprehensive cooling and heating load breakdown reports including breakdown by opaque load, window load, skylight load, infiltration load, ventilation load and internal load contributions 6. Opaque inputs include opaque type, opaque construction number, dimensions, and opening areas 7. Window inputs include window type, internal and external shading type, overhang dimensions, window area, and more.. 8. Skylight inputs include skylight type, dimensions, orientation, and more.. 9. Additional input types include # of people, # of bedrooms, ventilation airflow, and more.. 10. Includes the ability to display a comprehensive HTML report that you can email to yourself or others, and it also includes a spreadsheet attachment that you can open in Excel to further massage data on your desktop 11. Includes ability to input your company information to display on the emailed report 12. Includes ability to display units in either English (IP) or Metric (SI). 13. Equipment location services It also includes 2 bonus modules: 1. The "HVAC Equipment Locator" has the same functionality as our stand-alone Locator app. It allows you to input information about all of your HVAC equipment, upload it to a remote web server (at www.carmelsoft.com/EL), and SAFELY share information about it with other technicians within your company. The equipment's GPS coordinates become its globally unique identifier, allowing you to input and retrieve information about it just by standing next to it. 2. The “HVAC Quick Load” module allows you to quickly perform rule-of-thumb heating and cooling load calcs based upon just inputting the building type, square area, and # of people. Please see the description located under the stand-alone "HVAC Quick Load" app for more details about it. The benefits of using this app are: 1. Great for use out in the field. Quickly size heating and cooling equipment, show the client, then email the results back to your office for further analysis. 2. Show off your advanced on-screen reports to clients convincing them you are using cutting-edge technology 3. Save time by inputting information in the field and then returning to your office to perform more in-depth analysis This app was designed by Carmel Software Corporation, a 20-year old software design firm specializing in engineering analysis software applications geared toward engineers, architects, technicians, and home owners. In fact, our software powers the analysis capabilities of major Autodesk software tools such as Revit (The makers of AutoCAD). We will continue to update this app based upon user feedback. Please email us at info@carmelsoft.com for any comments. We also offer training and tutorial videos at: www.carmelsoft.com/HVACLoadPlus.
Shapr 3D CAD modeling
Design and collaborate on 3D models and drawings from any device, even offline. This intuitive CAD tool offers a clutter-free interface and real-time 3D renders in AR for seamless visual communication. Export and import a wide range of file formats for a complete design-to-manufacturing workflow.
- Multidevice and offline capability
- Adaptive, clutter-free user interface
- Real-time 3D renders in AR
- Extensive import/export file format support
- Output 2D Drawings
- Design-driven collaboration
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From design to manufacturing. Teams collaborate with more impact. Instinctive design meets multidevice capability and full interoperability for the ultimate 3D design workflow. All platforms Pick your device and your input tool leveraging the first CAD tool envisioned for multidevice. Hybrid workflow meets cross-functional team processes with automatic sync across devices. Work from any device or offline: design and collaborate at your best, everywhere. Compact tools. Space for focus. An adaptive user interface auto-sorts tools, taking the clutter out of designing. Your focus stays front and center to eliminate clunking around and prioritize high-quality decisions. Design-driven collaboration. Make designing a reflex and visual communication second nature for the whole team. Instinctive CAD meets a visual communication bundle complete with real-time 3D renders in AR, shareable via a link for download-free viewing. Start where you are and finish strong – no expensive hardware needed. Shapr3D combines industrial-grade CAD with a user-friendly experience, including: • Siemens™ geometric Parasolid® modeling kernel and D-Cubed™ sketch engine • Export support for X_T, STEP, STL, OBJ, 2D DXF, 2D DWG, IGES, 3MF, SVG • Import support for SLDPRT, SLDASM, X_T, STEP, STL, IGES, 2D DWG, 2D DXF, JPG, PNG • Output 2D Drawings Get in touch Have a question? Visit our forum: https://discourse.shapr3d.com. For support queries, please submit a request here: https://shapr3d.com/support Terms of Use: https://www.shapr3d.com/terms-of-use Privacy Policy: https://www.shapr3d.com/privacy-policy
Screenshots
Verdict
The clearest difference is price: Shapr 3D CAD modeling at Free against HVAC Load Plus's $24.99. Shapr 3D CAD modeling also leads on rating (4.7 vs 2.8) and update cadence (every 5 days vs every 9 months). HVAC Load Plus's advantage is iOS requirement (13.0 vs 17.0). On review sentiment, ads and in-app purchases 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
Shapr 3D CAD modeling is free to download; HVAC Load Plus costs $24.99 up front. HVAC Load Plus sells 1 one-off in-app purchase and Shapr 3D CAD modeling sells 6 in-app purchases, starting at $32.99 per month. Whichever you choose, the download price is not the number that matters.
Shapr 3D CAD modeling holds the better App Store score, 4.7 against 2.8. That said, the two scores are not equally well evidenced: Shapr 3D CAD modeling has 34K ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 60% of HVAC Load Plus's written reviews are positive against 52% of Shapr 3D CAD modeling's, so the app with the better star average is not the one people write more warmly about.
HVAC Load Plus ships an update every 9 months, Shapr 3D CAD modeling every 5 days. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.
| Parameter | HVAC Load Plus | Shapr 3D CAD modeling |
|---|---|---|
| Price | $24.99 | Free — better |
| Rating | 2.8 (5 ratings) | 4.7 (34K ratings) — better |
| Positive reviews | 60.0% of reviews — better | 52.4% of reviews |
| Number of ratings | 5 | 34K — better |
| Update frequency | Every 9 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPod | iPhone, iPad, Mac, Vision Pro — better |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 18 MB | 1.7 GB |
| Age rating | +4 | 4+ |
| Developer | Carmel Software Corporation | Shapr3D Zrt |
Customer experience
HVAC Load Plus
Shapr 3D CAD modeling
Bugs and requests
HVAC Load Plus
Not enough reviews yet to summarise bugs or requests.
Shapr 3D CAD modeling
Reported bugs
3 issues- Unreliable performance after recent updates
- Difficulty deleting or modifying existing designs
- Inconsistent behavior when using the Apple Pencil
Requested features
6 requests- Add more affordable pricing tiers for hobbyists
- Improve undo/redo functionality
- Implement better file management and organization
- Add support for importing/exporting more file formats
- Enhance parametric modeling capabilities
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- Introduce a one-time purchase option
In-app purchases
HVAC Load Plus
- HVAC Equipment Locator$9.99
Shapr 3D CAD modeling
- Solo Subscription14 Days trial$32.991 Month
- Pro Subscription14 Days trial$37.991 Month
- Business Subscription14 Days trial$59.991 Month
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- Solo Subscription14 Days trial$249.991 Year
- Pro Subscription14 Days trial$299.991 Year
- Business Subscription14 Days trial$499.991 Year
Questions
Is HVAC Load Plus free?
Is Shapr 3D CAD modeling free?
Which has better reviews, HVAC Load Plus or Shapr 3D CAD modeling?
Do HVAC Load Plus or Shapr 3D CAD modeling have ads?
Which is updated more often, HVAC Load Plus or Shapr 3D CAD modeling?
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