Comparison

Heat Engineer vs Knohow for Members

Price, ratings, monetisation and update history for both apps, side by side — 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. • 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

About

Knohow for Members

Discover local professional services recommended by your trusted network. Organize, book, and pay for services all in one place, saving you time and effort.

Highlights
  • Personal connection network
  • Discover trusted local resources
  • Organize professional services
  • Book services
  • Pay for services
Features
Read full description

Zillions of social media connections and questionable online reviews are meaningless. Re-boot with a highly personal connection network designed to help friends find trusted local resources. Save time with Knohow - one platform to discover professional services trusted by your close network, organize them, book them, and pay.

Screenshots

Heat Engineer4 screens
Knohow for Members4 screens

Verdict

The call

The clearest difference is in-app purchases: Knohow for Members at none against Heat Engineer's 1. 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Heat Engineer ships an update every 2 months, Knohow for Members monthly. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

Scorecard1 real difference · 9 level
Heat Engineer versus Knohow for Members: the parameters behind the verdict, then further details
ParameterHeat EngineerKnohow for Members
PriceFreeFree
Rating—5.0 (4 ratings) — better
Positive reviews78.9% of reviews—
Number of ratings—4 — better
Update frequencyEvery 2 monthsMonthly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.415.1 — better
Further details — not scored
Size306 MB252 MB
Age rating4+17+
DeveloperHeat Engineer Software LtdKAZZAH INC

Customer experience

Heat Engineer

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

Knohow for Members

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Heat Engineer

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

Knohow for Members

No in-app purchases

Questions

Is Heat Engineer free?
Heat Engineer is free to download, with in-app purchases available.
Is Knohow for Members free?
Knohow for Members is free to download, with no in-app purchases.
Do Heat Engineer or Knohow for Members have ads?
Neither Heat Engineer nor Knohow for Members shows ads.
Which is updated more often, Heat Engineer or Knohow for Members?
Heat Engineer ships an update every 2 months, and Knohow for Members monthly. Most recently, Heat Engineer was updated on November 1, 2026 and Knohow for Members on November 4, 2026.

Other comparisons