# Heat Engineer vs Fault Finding & Multimeters

The clearest difference is review sentiment: Heat Engineer at 79% against Fault Finding & Multimeters's 33%. Heat Engineer also leads on price (Free vs $4.99) and update cadence (every 2 months vs every 4 months). Fault Finding & Multimeters's advantage is in-app purchases (none vs 1) and device support (4 vs 2). On ads there is nothing between them.

Heat Engineer is free to download; Fault Finding & Multimeters costs $4.99 up front. Heat Engineer sells 1 one-off in-app purchase. Fault Finding & Multimeters asks for nothing beyond the download.

Heat Engineer ships an update every 2 months, Fault Finding & Multimeters every 4 months. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Heat Engineer | Fault Finding & Multimeters |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Positive reviews | **78.9% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | **Free** | Paid |
| Size | 306 MB | 37 MB |
| Requires iOS | 16.4 | **9.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple TV** |
| Age rating | 4+ | 4+ |
| Developer | [Heat Engineer Software Ltd](https://appshunter.io/developer/1461678894) | [Mr Combi Training](https://appshunter.io/developer/566867832) |

## 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 |


### Fault Finding & Multimeters

[App page](https://appshunter.io/ios/app/fault-finding-and-multimeters/id1212143364)

Learn to use multimeters and perform electrical safety tests with this comprehensive guide. Covers fault finding procedures, testing various components like pumps, fans, and sensors, and understanding system operation. Ideal for new technicians and experienced engineers.

**Highlights:** Multimeter usage and settings, Electrical safety tests, Fault isolation procedures, Testing pumps, fans, and sensors, Understanding sequence of operation, 21 detailed chapters

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

**In-app purchases:** none


## Frequently asked questions

### Is Heat Engineer free?

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

### Is Fault Finding & Multimeters free?

Fault Finding & Multimeters costs $4.99, with no in-app purchases.

### Do Heat Engineer or Fault Finding & Multimeters have ads?

Neither Heat Engineer nor Fault Finding & Multimeters shows ads.

### Which is updated more often, Heat Engineer or Fault Finding & Multimeters?

Heat Engineer ships an update every 2 months, and Fault Finding & Multimeters every 4 months. Most recently, Heat Engineer was updated on October 18, 2026 and Fault Finding & Multimeters on October 24, 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.*