# CASA Space Frame 3D vs Heat Engineer

The clearest difference is price: Heat Engineer at Free against CASA Space Frame 3D's $299.99. CASA Space Frame 3D's advantage is in-app purchases (none vs 1) and review sentiment (100% vs 79%). On update cadence, ads, device support and iOS requirement there is nothing between them.

Heat Engineer is free to download; CASA Space Frame 3D costs $299.99 up front. Heat Engineer sells 1 one-off in-app purchase. CASA Space Frame 3D asks for nothing beyond the download.

CASA Space Frame 3D ships an update every 3 months, Heat Engineer every 2 months. The most recent releases landed on June 9, 2026 and August 5, 2026 respectively.

## The numbers

| Metric | CASA Space Frame 3D | Heat Engineer |
| --- | --- | --- |
| Price | $299.99 | **Free** |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/casa-space-frame-3d/id371089612/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **100.0% of reviews** | 78.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 6 MB | 44 MB |
| Requires iOS | **14.1** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Intesym Ltd.](https://appshunter.io/developer/361434891) | [Heat Engineer Software Ltd](https://appshunter.io/developer/1461678894) |

## What reviewers say

### CASA Space Frame 3D

[App page](https://appshunter.io/ios/app/casa-space-frame-3d/id371089612)

This app enables structural engineers to perform static and dynamic elastic analysis of 3D space-frames. It offers quick and precise modeling with graphical interaction, providing numerical and graphical results for deflections, forces, and mode shapes.

**Highlights:** Linear static analysis, Non-linear static analysis (P-Delta), Dynamic analysis (natural modes, footfall), Extensive section and material libraries, Graphical interactive results, Metric & imperial units

**In-app purchases:** none


### Heat Engineer

[App page](https://appshunter.io/ios/app/heat-engineer/id879510552)

This app assists heating engineers and surveyors in collecting property data for heating system installations. It supports heat loss reports for various technologies and includes tools for sound assessments and quick estimations. Data is automatically saved for later review and amendment.

**Highlights:** Heat loss survey for BS EN 12831, CIBSE, and MCS standards, MCS 020 sound assessment for Air Source Heat Pumps, Quick heat loss estimator tool, Automatic data saving and history for amendments, Room-by-room heat loss calculation, Photo capture for rooms and installation locations, Fuel comparisons and running cost calculations

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MCS 020 PDF Report Token | $2.99 | one-time |


## Frequently asked questions

### Is CASA Space Frame 3D free?

CASA Space Frame 3D costs $299.99, with no in-app purchases.

### Is Heat Engineer free?

Heat Engineer is free to download, with in-app purchases available.

### Do CASA Space Frame 3D or Heat Engineer have ads?

Neither CASA Space Frame 3D nor Heat Engineer shows ads.

### Which is updated more often, CASA Space Frame 3D or Heat Engineer?

CASA Space Frame 3D ships an update every 3 months, and Heat Engineer every 2 months. Most recently, CASA Space Frame 3D was updated on June 9, 2026 and Heat Engineer on August 5, 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.*