Comparison

IAPMO Codes vs HVAC Know It All

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

Head to head
About

IAPMO Codes

Access and manage your purchased IAPMO codes, including the UPC, UMC, and others. Make annotations, record voice notes, and view content offline. Stay informed with code errata, committee information, and breaking news.

Highlights
  • View purchased IAPMO codes
  • Offline access
  • Make annotations
  • Voice recordings
  • Access code errata
  • View development timeline
  • Direct access to engineering staff
Features
Read full description

View your purchased IAPMO codes such as the UPC, UMC, USHGC, USPSHTC, WEStand and NSPC. Make annotations, voice recordings or view offline while heading to your next meeting. Have access to code errata, apply to committees, see the current timeline, be informed of the process and be notified for any breaking news. Get full access to all codes development related information. You will also have direct access to the engineering staff and support staff for any questions on the codes or the process.

About

HVAC Know It All

Connect with HVAC/R professionals to enhance your skills through educational discussions. This app aims to help technicians, installers, owners, educators, and students improve their expertise in the trade.

Highlights
  • Educational discussions
  • Professional networking
  • Skill enhancement
  • Trade knowledge sharing
  • Technician resources
Read full description

HVAC Know It All is a community of HVAC/R professionals. The goal, through educational discussion, is to become better technicians, installers, company owners, educators and students of the trade. PRICING INFORMATION: This app has a 7 day free trial after which a subscription of $0.99 monthly OR $9.99 yearly is required in order to access the entire app. • Payment will be charged to your iTunes Account at confirmation of purchase. • Your subscription will automatically renew unless auto-renew is turned off at least 24-hours before the end of the current period. • Your account will be charged for renewal within 24-hours prior to the end of the current period. • You can manage your subscriptions and turn off auto-renewal by going to your iTunes Account Settings after purchase. • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Please find a link to the Privacy Policy below: https://bluecollarguru.disciplemedia.com/privacy_policy Please find a link to the Terms of Service below: https://bluecollarguru.disciplemedia.com/terms_and_conditions

Screenshots

IAPMO Codes4 screens
HVAC Know It All3 screens

Verdict

The call

The clearest difference is review sentiment: HVAC Know It All at 84% against IAPMO Codes's 0%. HVAC Know It All also leads on rating (4.8 vs 3.8) and ratings volume (221 vs 6). IAPMO Codes's advantage is in-app purchases (none vs 2) and device support (3 vs 1). On price, update cadence and ads 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. HVAC Know It All sells 2 in-app purchases, starting at $0.99 per month. IAPMO Codes asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

HVAC Know It All holds the better App Store score, 4.8 against 3.8. That said, the two scores are not equally well evidenced: HVAC Know It All has 221 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 0% of IAPMO Codes's written reviews are positive against 84% of HVAC Know It All's.

UpkeepUpdate frequency

IAPMO Codes ships an update every 7 months, HVAC Know It All every 6 months. The most recent releases landed on June 1, 2026 and September 17, 2026 respectively.

Scorecard7 real differences · 3 level
IAPMO Codes versus HVAC Know It All: the parameters behind the verdict, then further details
ParameterIAPMO CodesHVAC Know It All
PriceFreeFree
Rating3.8 (6 ratings)4.8 (221 ratings) — better
Positive reviews0.0% of reviews83.7% of reviews — better
Number of ratings6221 — better
Update frequencyEvery 7 monthsEvery 6 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterSubscription
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size22 MB67 MB
Age rating4+17+
DeveloperInternational Association of Plumbing and Mechanical OfficialsHVAC Know It All Inc.

Customer experience

IAPMO Codes

All ratings6 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

HVAC Know It All

All ratings221 ratings
Positive95.5%
Neutral0.9%
Negative3.6%
Written reviews49 reviews
Positive83.7%
Neutral0.0%
Negative16.3%

Bugs and requests

IAPMO Codes

Not enough reviews yet to summarise bugs or requests.

HVAC Know It All

Requested features

1 request
  • More content for the residential group

In-app purchases

None

IAPMO Codes

No in-app purchases

2 purchases

HVAC Know It All

Subscriptions2
  • Monthly Subscription7 Days trial$0.991 Month
  • Yearly Subscription7 Days trial$9.991 Year

Questions

Is IAPMO Codes free?
IAPMO Codes is free to download, with no in-app purchases.
Is HVAC Know It All free?
HVAC Know It All is free to download, with in-app purchases available.
Which has better reviews, IAPMO Codes or HVAC Know It All?
HVAC Know It All is rated higher. IAPMO Codes averages 3.8 out of 5 from 6 ratings, while HVAC Know It All averages 4.8 from 221 ratings.
Do IAPMO Codes or HVAC Know It All have ads?
Neither IAPMO Codes nor HVAC Know It All shows ads.
Which is updated more often, IAPMO Codes or HVAC Know It All?
IAPMO Codes ships an update every 7 months, and HVAC Know It All every 6 months. Most recently, IAPMO Codes was updated on June 1, 2026 and HVAC Know It All on September 17, 2026.

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