Heat Engineer vs ESi Centro Smart
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Heat Engineer
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.
- 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
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Heat Engineer Software helps heating engineers and surveyors capture property information on site, carry out heat loss surveys and assess air source heat pump sound levels. From a quick estimate to a detailed room-by-room survey (3D LiDAR scanning), gather the information you need for heat pump and conventional heating system design. Work from your iPhone or iPad, then continue with your project in the Heat Engineer desktop platform. ROOM-BY-ROOM HEAT LOSS SURVEYS Capture the property details needed for heat loss calculations designed to follow BS EN 12831-1:2017, the CIBSE Domestic Heating Design Guide and relevant MCS requirements. • Create rooms using preset or custom names. • Record room dimensions, building materials and construction details. • Select materials from the built-in library or enter custom descriptions and U-values. • Record walls, floors, windows, doors, ceilings and roofs. • Capture complex room shapes and vaulted ceilings using illustrated profiles. • Record existing radiator types and dimensions to support emitter assessment. • Add photographs of rooms and proposed installation locations. • Continue your survey in the desktop platform to review calculations and produce detailed reports. CHOOSE HOW YOU MEASURE Use a tape measure or laser measure and enter your measurements, or use built-in LiDAR scanning on a compatible iPhone or iPad to capture room dimensions and layouts. Choose the survey method that suits the property and the equipment you have available. LiDAR scanning requires a compatible device with a LiDAR sensor. FLOOR PLANS AND LIDAR SCANNING Bring your survey to life with a visual layout of the property. • Scan rooms using supported LiDAR devices. • View captured rooms and layouts. • See room dimensions and radiator locations within your floor plans. • Export 2D floor plans to PDF for use alongside your project documentation. WHOLE-HOUSE HEAT LOSS AND QUICK ESTIMATES Assess a property before progressing to a detailed room-by-room survey. Use whole-house heat loss and quick estimation tools to support early discussions, initial project assessments and quotation preparation. Preliminary estimates help you get started. Complete a detailed room-by-room calculation to support final heating system and emitter design. AIR SOURCE HEAT PUMP SOUND ASSESSMENTS Carry out sound assessments to support assessment of the noise requirements associated with permitted development. • Record the proposed heat pump manufacturer and model. • Enter the manufacturer’s A-weighted sound power level. • Record the assessment position and add supporting photographs. • Review the assessment result. • Return to an assessment to update equipment details or site information. • Produce a PDF assessment report for your project records. A sound assessment addresses noise criteria; other planning requirements may also apply. CONNECTED FROM SITE TO DESKTOP Keep your mobile survey and desktop project connected with the updated Heat Engineer platform. Save your work, revisit surveys and assessments, and continue adding information as the project develops. Capture details on site, then use the desktop platform for further design work and reporting. GET STARTED A Heat Engineer account is required. Visit our website to create an account, explore the platform and watch our training videos
ESi Centro Smart
Control your plug-in devices remotely using your iPhone or iPad via Wi-Fi. Schedule devices to turn on or off at specific times and monitor their power consumption in real-time or historically. Automatically restart your router when the internet is down.
- Remote device control
- Global access via cloud
- Customizable schedules
- Real-time power monitoring
- Historical consumption data
- Automatic router reboot
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Centro Smart app together with your Wi-Fi controlled Smart Plug or Smart Strip enables you to control your plug- in devices remotely with your iPhone or iPad via Wi-Fi locally and remotely from anywhere in the world. - Remote control – Turn your PC, lamp, fan, coffee machine or any other plug-in device directly from your iPhone or iPad - Cloud ready– Control you home devices from anywhere in the world - Schedule – Set your device to turn on or off at specific time (e.g. wake up to freshly brewed coffee in the morning). - Power Consumption – Measure the power consumption of your device in real-time or check the history consumption of the past hours, days and months. - Socket Reboot – Automatically restart your router when the internet is down.
Screenshots
Verdict
The clearest difference is review sentiment: Heat Engineer at 79% against ESi Centro Smart's 0%. ESi Centro Smart's advantage is in-app purchases (none vs 1) and iOS requirement (8.0 vs 16.4). On price, update cadence, ads and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Heat Engineer sells 1 one-off in-app purchase. ESi Centro Smart asks for nothing beyond the download.
Heat Engineer ships an update every 2 months, ESi Centro Smart every 6 weeks. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.
| Parameter | Heat Engineer | ESi Centro Smart |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 78.9% of reviews — better | 0.0% of reviews |
| Update frequency | Every 2 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.4 | 8.0 — better |
| Further details — not scored | ||
| Size | 306 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Heat Engineer Software Ltd | ESI Controls Ltd |
Customer experience
Heat Engineer
ESi Centro Smart
In-app purchases
Heat Engineer
- MCS 020 PDF Report Token$2.99
ESi Centro Smart
No in-app purchases
Questions
Is Heat Engineer free?
Is ESi Centro Smart free?
Do Heat Engineer or ESi Centro Smart have ads?
Which is updated more often, Heat Engineer or ESi Centro Smart?
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