# Heat Engineer vs Alpha Draw

The clearest difference is in-app purchases: Alpha Draw at none against Heat Engineer's 1. Alpha Draw also leads on iOS requirement (13.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

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

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on August 5, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Heat Engineer | Alpha Draw |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 78.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 44 MB | 17 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Heat Engineer Software Ltd](https://appshunter.io/developer/1461678894) | [Start Software](https://appshunter.io/developer/1188622857) |

## 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 |


### Alpha Draw

[App page](https://appshunter.io/ios/app/alpha-draw/id1486168079)

**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 Alpha Draw free?

Alpha Draw is free to download, with no in-app purchases.

### Do Heat Engineer or Alpha Draw have ads?

Neither Heat Engineer nor Alpha Draw shows ads.

### Which is updated more often, Heat Engineer or Alpha Draw?

Heat Engineer ships an update every 2 months, and Alpha Draw every 2 months. Most recently, Heat Engineer was updated on August 5, 2026 and Alpha Draw on September 8, 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.*