# Heat Engineer vs MUT SELECTION

The clearest difference is in-app purchases: MUT SELECTION at none against Heat Engineer's 1. MUT SELECTION also leads on iOS requirement (13.0 vs 16.4). Heat Engineer's advantage is update cadence (every 2 months vs every 39 months). On price, ads and device support there is nothing between them.

Both are free to download. Heat Engineer sells 1 one-off in-app purchase. MUT SELECTION asks for nothing beyond the download.

Heat Engineer ships an update every 2 months, MUT SELECTION every 39 months. The most recent releases landed on October 2, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Heat Engineer | MUT SELECTION |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 78.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 39 months |
| Monetization | Free | — |
| Size | 203 MB | 99 MB |
| Requires iOS | 16.4 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Heat Engineer Software Ltd](https://appshunter.io/developer/1461678894) | [MUT MECCANICA TOVO SPA](https://appshunter.io/developer/1675835772) |

## What reviewers say

### 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 |


### MUT SELECTION

[App page](https://appshunter.io/ios/app/mut-selection/id6446083794)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Heat Engineer free?

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

### Is MUT SELECTION free?

MUT SELECTION is free to download, with no in-app purchases.

### Do Heat Engineer or MUT SELECTION have ads?

Neither Heat Engineer nor MUT SELECTION shows ads.

### Which is updated more often, Heat Engineer or MUT SELECTION?

Heat Engineer ships an update every 2 months, and MUT SELECTION every 39 months. Most recently, Heat Engineer was updated on October 2, 2026 and MUT SELECTION on October 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*