Comparison

Heat Engineer vs AC Commission Pro

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 has been designed to help heating engineers and surveyors gather information about a property for the installation of a heating system. The options available for heat loss reports are renewable technologies such as Air Source Heat Pumps, Ground Source Heat Pumps, Biomass or conventional fossil fuels. Please visit our website to create an account and watch our training videos. www.heat-engineer.com Heat Engineer Software Ltd is an Industrial Associate Supporter of the Chartered Institute of Plumbing & Heating Engineering. ----Heat Engineer has three functions ---- 1 - Heat Loss survey, designed to meet BS EN 12831, CIBSE Domestic Heating Design Guide and MCS standards. When the survey is completed you can send it to your account at www.heat-engineer.com 2 - MCS 020 Planning Standards, sound assessment for Air Source Heat Pumps. 3 - A quick heat loss estimator tool. -----Important useful feature---- Every entry made is automatically saved in the app’s history so you can revisit any time to amend either your sound assessment or heat loss survey. For MCS 020 Sound assessments this is particularly useful if you don’t know the sound power decibel rating whilst on site and haven’t yet decided which manufacturer to use. You can use the app on site to record data you have and revisit your history to update the project once you’re back in the office. We now have a LiDAR feature. 1----Heat Loss Survey---- Complete a site survey for a room by room heat loss calculation. The parameters within this app are detailed so calculations can be carried out following the domestic heating design guide and requirements to meet MCS standards. This tool is for collecting details of a property so you can then send it to an online Heat Engineer account. If you are a Heat Engineer account holder at www.heat-engineer.com then you can review your survey and produce a detailed heat loss report. Take photos for each room and installation locations. • Pre-populated drop down lists for room names and options to add custom names. • Pre-populated drop down lists and options to add custom description and U values for all building materials, walls, floors, windows, doors, ceilings and roof. • For ‘complex rooms’, rooms with lofted/vaulted ceilings and roof an option to select which image profile, so measurement and wall types can quickly be entered. • Current Emitter selection, quickly select the radiator profile image from our list and enter the height and length. Heat Engineer online www.heat-engineer.com will calculate the output based on the designed flow temperature in the final report. • Send completed survey to a Heat Engineer account online at www.Heat-Engineer.com • Surveys submitted for the heat loss calculation the ‘internal room design temperatures’ and ‘air changes per hour ‘will be based on the room name and age of the room. Energy kWh demand and running costs is calculated using degree day data. Fuel comparisons are also available. 2----MCS 020 Planning Standards, sound assessment for Air Source Heat Pumps- To ensure a proposed Air Source Heat Pump installation is a ‘permitted development’ for sound conditions use this app if you’re an MCS installer for the handover pack. • Enter any manufacturer and model name • Enter the A weighted sound power (dB) level for the chosen model (you can change this information in the history when you decide which model you want to install) • Enter a description of assessment position • Take and add a photo of the assessment position for your final PDF report • A clear indication of assessment results • Send a two page PDF report of the completed MCS 020 assessment to your office via email 3----Heat Loss Estimator---- This heat loss estimator tool has been designed to provide heating estimations on Power kW and Energy kWh demands for domestic and commercial properties. The tool provides approximations to aid the quotation / tendering process before a project is accepted.

About

AC Commission Pro

Features
Read full description

AC Commission Pro — Certificates for AC & Refrigeration Engineers Create professional, F-Gas compliant commissioning and service certificates on site in minutes — for air conditioning, refrigeration and freezer systems. Built by an engineer, for engineers who want to finish the paperwork before they leave site. Now covers refrigeration & freezer work Not just AC. Commission and service cold rooms, freezers, walk-ins, display cabinets, condensing units and pack systems — with defrost settings, controller setpoints and operating temperatures. Choose from 23 refrigerants, each tagged with its ASHRAE Standard 34 safety group (A1, A2L, A3, B2L) and GWP for accurate F-Gas reporting. Everything you need on site • Commissioning & Service Certificates — pressure test, vacuum test, electrical readings, on-site times and digital signatures. Professional PDF generated instantly. • Job Sheets — record work, parts, photos, mileage and times; share a branded PDF by email, Messages, AirPrint or Files. • OCR Data Plate Scanner — point the camera at a data plate and the model and serial are read automatically. No typing, no mistakes. • QR Asset Labels — stick a QR label on the unit; scan it any time to pull up that unit's full service history. • Per-system history — every unit's installs, services and job sheets in one place, VRF-aware so multi-outdoor systems group correctly. • Refrigerant van stock — track cylinders, log usage and recovery, and generate F-Gas audit reports. • Company branding — your logo, company details and accreditation numbers on every certificate. Your data is safe • Works offline — no signal needed on site. • One-tap iCloud backup and restore — switch phones and get everything back in seconds. • Your records stay on your device and in your iCloud. Nothing is shared without you. Made for the field Fast, clean and simple — designed for iPhone and iPad, so you can fill in a certificate one-handed on a rooftop or review it on a bigger screen back in the van. Download and start your free trial today. Spend less time on paperwork and more time on the tools. Subscriptions automatically renew unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple ID account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://ac-commission-pro.co.uk/privacy.html

Screenshots

Heat Engineer4 screens
AC Commission Pro4 screens

Verdict

The call

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.

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 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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 6 level
Heat Engineer versus AC Commission Pro: the parameters behind the verdict, then further details
ParameterHeat EngineerAC Commission Pro
PriceFreeFree
Positive reviews78.9% of reviews
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better18.5
Further details — not scored
Size44 MB29 MB
Age rating4+4+
DeveloperHeat Engineer Software LtdSIMON TONY PASLEY

In-app purchases

1 purchases

Heat Engineer

One-time1
  • MCS 020 PDF Report Token$2.99
10 purchases

AC Commission Pro

Subscriptions6
  • Pro Monthly$7.991 Month
  • Solo$79.991 Year
  • Pro Yearly$79.991 Year
Show 3 more
  • Small Team$499.001 Year
  • Team$799.001 Year
  • Business$999.991 Year
One-time4
  • 100 AI Tokens$9.99
  • 500 AI Tokens$29.99
  • 2000 AI Tokens (Best Value)$79.99
Show 1 more
  • 5000 AI Tokens$149.99

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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