Comparison

Heat Engineer vs Assess+

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

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.

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
Read full description

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. β€’ Create rooms using preset or custom names. β€’ Record room dimensions, building materials and construction details. β€’ Select materials from the built-in library or enter custom descriptions and U-values. β€’ Record walls, floors, windows, doors, ceilings and roofs. β€’ Capture complex room shapes and vaulted ceilings using illustrated profiles. β€’ Record existing radiator types and dimensions to support emitter assessment. β€’ Add photographs of rooms and proposed installation locations. β€’ 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. β€’ Scan rooms using supported LiDAR devices. β€’ View captured rooms and layouts. β€’ See room dimensions and radiator locations within your floor plans. β€’ 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. β€’ Record the proposed heat pump manufacturer and model. β€’ Enter the manufacturer’s A-weighted sound power level. β€’ Record the assessment position and add supporting photographs. β€’ Review the assessment result. β€’ Return to an assessment to update equipment details or site information. β€’ 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

About

Assess+

This app streamlines on-site data collection for property assessment professionals. It integrates with PAS Hub and Assessor Hub platforms to support various assessment types, generating compliance documentation.

Highlights
  • PAS Hub integration
  • Assessor Hub integration
  • Retrofit Assessment support
  • EPC completion
  • Legionella Report generation
  • On-site data collection
Features
Read full description

Assess+ is the companion application to the Cotality UK PAS Hub and ecmk Assessor Hub platforms. It's designed to support professionals across the retrofit and property assessment industry by providing efficient on-site data collection for a range of assessment types. Assess+ supports the following features: PAS Hub Integration - Complete Retrofit Assessments, Technical Surveys, Installation Surveys, and RC Site Visits for submission to PAS Hub. This will generate compliance documentation for the relevant standards, such as for PAS 2030/2035 and TrustMark Licence Plus, as well as cover funding-specific requirements, such as the ECO Reporting Working Group documents. Assessor Hub Integration - Complete EPCs and Legionella Reports for submission to Assessor Hub. Note that you must be accredited with ecmk to complete the following assessment types and access to Assess+ will be provided as part of your onboarding: Retrofit Assessment EPC Legionella Report About Cotality: Empowering the Property Services Industry through Technology, Data and Connectivity. Mobile surveying and workflow management software, combined with data and analytical insights, supporting the UK property services industry. Solutions that help to streamline operations,enhance productivity, enable smarter decision making and mitigate property-related risk.

Screenshots

Heat Engineer4 screens
Assess+4 screens

Verdict

The call

The clearest difference is review sentiment: Heat Engineer at 79% against Assess+'s 14%. Assess+'s advantage is in-app purchases (none vs 1). On price, update cadence, ads and monetization model there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

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

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 2, 2026 and September 28, 2026 respectively.

Scorecard2 real differences Β· 6 level
Heat Engineer versus Assess+: the parameters behind the verdict, then further details
ParameterHeat EngineerAssess+
PriceFreeFree
Positive reviews78.9% of reviews β€” better14.3% of reviews
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesYesNo β€” better
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.416.0 β€” better
Further details β€” not scored
Size203 MB140 MB
Age rating4+4+
DeveloperHeat Engineer Software LtdCoreLogic U.K. Limited

Customer experience

Heat Engineer

Written reviews19 reviews
Positive78.9%
Neutral0.0%
Negative21.1%

Assess+

Written reviews7 reviews
Positive14.3%
Neutral42.9%
Negative42.9%

In-app purchases

1 purchases

Heat Engineer

One-time1
  • MCS 020 PDF Report Token$2.99
None

Assess+

No in-app purchases

Questions

Is Heat Engineer free?
Heat Engineer is free to download, with in-app purchases available.
Is Assess+ free?
Assess+ is free to download, with no in-app purchases.
Do Heat Engineer or Assess+ have ads?
Neither Heat Engineer nor Assess+ shows ads.
Which is updated more often, Heat Engineer or Assess+?
Heat Engineer ships an update every 2 months, and Assess+ every 2 months. Most recently, Heat Engineer was updated on October 2, 2026 and Assess+ on September 28, 2026.

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