Comparison

EMAT Field Auditor vs IHWAP Diagnostics

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

Head to head
About

EMAT Field Auditor

Streamline energy audits with a mobile tool that allows for quick data capture, photo tagging, and cloud synchronization. Customize templates for various audit types and access support from experienced energy professionals.

Highlights
  • Customizable audit templates
  • Photo tagging for equipment
  • Cloud synchronization
  • Offline functionality
  • Multi-auditor support
  • Imperial/metric support
Features
Read full description

Simplify. Centralize. Customize. EMAT Field Auditor allows you to conduct energy audits of commercial and residential buildings as quickly, easily and efficiently as possible. If you’re an energy auditor, you know how important it is to get in and out of a building as quickly as possible with all the information you need, so you can spend your time on your project or audit report instead of walking through buildings. EMAT Field Auditor is designed to help you do exactly that. With EMAT Field Auditor, you can quickly swipe and tap your way through a building, efficiently and smoothly taking photos and capturing data as you go. While you’re doing that, Field Auditor is sending your data to the cloud, organizing it, and preparing it for review and export to your analysis and reporting systems. Conduct different types of audits? ASHRAE Level I, Level II, lighting, commercial, residential, equipment specific? No problem. With Field Auditor, you can create custom data fields and an unlimited number of customized templates for all the audit types you need. Using Field Auditor is easy. You can setup your client, installation, building and areas back at the office, or right at the site. Select your audit template, and get right to work. EMAT is already set up to capture data on lighting, HVAC systems, building envelope and more. But again, you can customize it with any additional fields you need. As you go through the building, photos are automatically tagged to the area or equipment and those relationships are preserved, saving you tons of time when you’re back at the office. And because the data you collect is synched to the cloud as you go, associates and other team members can review the data as you go, from wherever they are, helping to ensure that you never have to go back to a site to get missed data. Need some help with Field Auditor while you’re out in the field or back at the office? Again, no problem. EMAT Field Auditor is backed by a team of energy engineers and auditors. So when you call us, you’ll be talking to someone who does what you do, can understand and relate, and can solve your problem. EMAT Field Auditor features: Use on Any Device Tablets & Phones No WiFi Needed No pre-audit setup or prep required Start a new audit in the field Supports multiple auditors at once No internet access required Customizable Audit Templates Design your own audit templates Choose / edit existing templates Fully customizable Commercial, Industrial, Residential Photo Management Use native camera functions Camera-leading audit option Photo tagging for equipment, area, name plate, etc. Internationally Capable Use imperial or metric Multilingual

About

IHWAP Diagnostics

This application assists with home weatherization by quantifying air leakage, calculating ventilation needs, and assessing duct system pressure against program standards. It helps prioritize air sealing and ensures compliance with energy efficiency guidelines.

Highlights
  • Zone Pressure Diagnostics (ZPD)
  • Total External Static Pressure (TESP) calculation
  • ASHRAE ventilation requirements
  • Leakage reduction potential estimation
  • ENERGY STAR compliance checks
Features
Read full description

Illinois Home Weatherization Assistance Program (IHWAP) Diagnostics application for the University of Illinois. This app is the product of a collaboration between the Indoor Climate Research & Training Center’s Senior Weatherization Trainer, Nate Price, and me. The Zone Pressure Diagnostics (ZPD) function will quantify the connection between the house and a zone and between that zone and the outdoors. It will also estimate the total leakage reduction potential in the zone, which should assist with prioritizing air sealing measures. The Total External Static Pressure (TESP) function will calculate total pressure and the pressure caused by the various components of a duct system and compare them to Illinois Home Weatherization Assistance Program (IHWAP) standards for recommended replacement options. The American Society of Heating and Air-Conditioning Engineers (ASHRAE) function will calculate home ventilation requirements ensuring proper pollutant control and ENERGY STAR compliance.

Screenshots

EMAT Field Auditor1 screens
IHWAP Diagnostics4 screens

Verdict

The call

The clearest difference is iOS requirement: EMAT Field Auditor at 13.0 against IHWAP Diagnostics's 16.0. On price, rating, ratings volume and update cadence 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for EMAT Field Auditor against 5.0 for IHWAP Diagnostics. Both are backed by a comparable volume of ratings — 8 and 5 respectively.

UpkeepUpdate frequency

EMAT Field Auditor ships an update every 3 months, IHWAP Diagnostics every 5 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard1 real difference · 9 level
EMAT Field Auditor versus IHWAP Diagnostics: the parameters behind the verdict, then further details
ParameterEMAT Field AuditorIHWAP Diagnostics
PriceFreeFree
Rating5.0 (8 ratings)5.0 (5 ratings)
Positive reviews—100.0% of reviews
Number of ratings8 — better5
Update frequencyEvery 3 months — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.0
Further details — not scored
Size47 MB75 MB
Age rating4+4+
DeveloperEMAT, LLCTravis Jenkins

Customer experience

EMAT Field Auditor

All ratings8 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

IHWAP Diagnostics

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

EMAT Field Auditor

No in-app purchases

None

IHWAP Diagnostics

No in-app purchases

Questions

Is EMAT Field Auditor free?
EMAT Field Auditor is free to download, with no in-app purchases.
Is IHWAP Diagnostics free?
IHWAP Diagnostics is free to download, with no in-app purchases.
Which has better reviews, EMAT Field Auditor or IHWAP Diagnostics?
EMAT Field Auditor and IHWAP Diagnostics are both rated 5.0 out of 5 on the App Store, from 8 and 5 ratings respectively.
Do EMAT Field Auditor or IHWAP Diagnostics have ads?
Neither EMAT Field Auditor nor IHWAP Diagnostics shows ads.
Which is updated more often, EMAT Field Auditor or IHWAP Diagnostics?
EMAT Field Auditor ships an update every 3 months, and IHWAP Diagnostics every 5 months. Most recently, EMAT Field Auditor was updated on November 2, 2026 and IHWAP Diagnostics on November 3, 2026.

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