# Heat Engineer vs AC Commission Pro

The clearest difference is update cadence: AC Commission Pro at weekly against Heat Engineer's every 2 months. Heat Engineer's advantage is iOS requirement (15.6 vs 18.5). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Heat Engineer sells 1 one-off in-app purchase and AC Commission Pro sells 10 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Heat Engineer ships an update every 2 months, AC Commission Pro weekly. The most recent releases landed on August 5, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Heat Engineer | AC Commission Pro |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 78.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free | — |
| Size | 44 MB | 29 MB |
| Requires iOS | **15.6** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Heat Engineer Software Ltd](https://appshunter.io/developer/1461678894) | [SIMON TONY PASLEY](https://appshunter.io/developer/1848135031) |

## 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 |


### AC Commission Pro

[App page](https://appshunter.io/ios/app/ac-commission-pro/id6754388872)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $7.99 | per month |
| Solo | $79.99 | per year |
| Pro Yearly | $79.99 | per year |
| Small Team | $499.00 | per year |
| Team | $799.00 | per year |
| Business | $999.99 | per year |
| 100 AI Tokens | $9.99 | one-time |
| 500 AI Tokens | $29.99 | one-time |
| 2000 AI Tokens (Best Value) | $79.99 | one-time |
| 5000 AI Tokens | $149.99 | one-time |


## Frequently asked questions

### Is Heat Engineer free?

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

### Is AC Commission Pro free?

AC Commission Pro is free to download, with in-app purchases available.

### Do Heat Engineer or AC Commission Pro have ads?

Neither Heat Engineer nor AC Commission Pro shows ads.

### Which is updated more often, Heat Engineer or AC Commission Pro?

Heat Engineer ships an update every 2 months, and AC Commission Pro weekly. Most recently, Heat Engineer was updated on August 5, 2026 and AC Commission Pro on September 15, 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.*