Comparison

HEAT3D Pro vs Thermal Transmittance Calc

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

Head to head
About

HEAT3D Pro

Features
Read full description

Heat3D allows you to precisely measure heat flow and U-values of building elements using a low-cost, quick and non-invasive method. Heat3D is designed to work on iPhones and iPads and uses a portable thermal camera to obtain results in an hour as opposed to days or weeks using heat flux plates. The rapid nature of the measurement enables quantified U-values that are more accurate than manual calculation methods but achievable in a similar amount of time. The Heat3D iOS app uses Apple ARKit to detect room features such as walls, floors and ceilings and construct a 3D model. When combined with a FLIR portable camera, infrared thermal images are projected onto the 3D model showing the heat signature through each surface. Quantitative infrared thermography is used to calculate the heat loss or gain through these surfaces and calculate the U-value. Measuring an accurate U value across an entire element with Heat3D can take as little as 1-hour meaning that the measurement of actual U-values is now possible in all projects. There is short video demonstrating how to use HEAT3D to capture a 3D energy survey of a room in 1 minute on the HEAT3D website - https://heat3d.net Why measure U-values using Heat3D? -Improved EPC accuracy Use the measured U value in EPC reports as opposed to calculated ones that can be +/-50% or more out. -Determine insulation levels Understand baseline thermal transmittance of walls and current insulation levels, allowing better target investment in insulation upgrades. -Retrofit improvement Measure before and after insulation upgrades or retrofit works to determine the true energy, running cost and CO₂ savings delivered by improvements. -Check quality assurance Check that the actual performance meets the designed performance. Identify poor installations, workmanship and conduct quality assurance testing. -Reduced remedial work Measure during works and before completion to check that desired outcomes are being achieved. Save time, costs and improve quality by identifying issues and reducing remedial action. Who is Heat3D designed for? Heat3D can be used by anyone who wants to know the U-value or thermal performance of building elements in-situ. Measurements can be taken before, during and after insulation upgrades to verify performance improvements; Architects, Building Managers, Building Surveyors, Energy Assessors, House Builders, Insulation Installers, Retrofit Coordinators, Sustainability Consultants A GPS enabled iPhone or iPad device with ARKit is required ( Wifi only iPad is not supported). You’ll need a FLIROne® camera. We recommend using the FLIR One Pro if possible, it will produce more accurate measurements and with higher resolution. An enviromental and a radiative temperature target is required to achieve ISO 9869 part 2 accuracy with HEAT3D Pro. Please contact business@electricpocket.com for advice on obtaining these. ARKit Compatible devices iPhone 8 and later iPhone X and later iPad (2019) and later Heat3D is the product of years of research and real-world testing into quantitative infrared thermography techniques. It has been successfully tested and proven in the lab and over 24 buildings of varying construction and age and shown to provide the same level of accuracy for heat flow and U value measurements as the very expensive and time consuming ISO 9869 standards approved HeatFlux plate method. Acknowledgements:- The research and development behind HEAT3D was part funded by Innovate UK and supported by the Energy Houses at Salford University. Privacy: https://electricpocket.com/privacy.html

About

Thermal Transmittance Calc

Calculate heat loss and humidity issues in building structures. Input air temperature, humidity, and material layers to visualize temperature and dew point changes. Supports both Celsius/Fahrenheit and cm/inches.

Highlights
  • Calculate heat loss
  • Identify humidity problems
  • Visualize temperature and dew point changes
  • Supports Celsius and Fahrenheit
  • Supports centimeters and inches
  • Easy data entry and immediate results
Features
Read full description

This application allows you to help in checking the existing and planning future isolation. After entering data on the temperature and humidity of the air and selecting all layers of the enclosing structure (starting from inside the building and ending with the exterior trim of the facade or roof) in the Thermal Transmittance Calc, you will receive information on all likely heat losses, as well as possible problems with humidity. A schedule will be built, according to which you can track how the temperature and humidity will change and where the dew point in the layers of the structure will be. - Easy to use, enter all the data and immediately get the results. - Ability to enter the temperature in both Celsius and Fahrenheit. - Ability to enter the size of the layer in centimeters and inches.

Screenshots

HEAT3D Pro4 screens
Thermal Transmittance Calc4 screens

Verdict

The call

The clearest difference is price: Thermal Transmittance Calc at Free against HEAT3D Pro's $690.00. HEAT3D Pro's advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support and iOS requirement 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

Thermal Transmittance Calc is free to download; HEAT3D Pro costs $690.00 up front. Thermal Transmittance Calc sells 2 one-off in-app purchases. HEAT3D Pro asks for nothing beyond the download.

UpkeepUpdate frequency

HEAT3D Pro ships an update every 4 months, Thermal Transmittance Calc every 11 months. The most recent releases landed on November 2, 2026 and November 6, 2026 respectively.

Scorecard4 real differences · 6 level
HEAT3D Pro versus Thermal Transmittance Calc: the parameters behind the verdict, then further details
ParameterHEAT3D ProThermal Transmittance Calc
Price$690.00Free — better
Rating—4.1 (11 ratings) — better
Positive reviews—75.0% of reviews
Number of ratings—11 — better
Update frequencyEvery 4 months — betterEvery 11 months
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.6
Further details — not scored
Size125 MB119 MB
Age rating4+4+
DeveloperElectric PocketALEXEY KOZLOV

In-app purchases

None

HEAT3D Pro

No in-app purchases

2 purchases

Thermal Transmittance Calc

One-time2
  • Remove Ads$2.99
  • Creating a new material$2.99

Questions

Is HEAT3D Pro free?
HEAT3D Pro costs $690.00, with no in-app purchases.
Is Thermal Transmittance Calc free?
Thermal Transmittance Calc is free to download, with in-app purchases available.
Do HEAT3D Pro or Thermal Transmittance Calc have ads?
Thermal Transmittance Calc shows ads; HEAT3D Pro does not.
Which is updated more often, HEAT3D Pro or Thermal Transmittance Calc?
HEAT3D Pro ships an update every 4 months, and Thermal Transmittance Calc every 11 months. Most recently, HEAT3D Pro was updated on November 2, 2026 and Thermal Transmittance Calc on November 6, 2026.

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