“I like the app, but!!!! I find the app appealing, however, I am terminating my trial subscription. I would be comfortable with a one-time fee for the subscription, but not an annual renewal fee. I possess the physical construction master…”
Independent automated assessment · 3 signal sources · 501 reviews scanned · analyzed 2026-10-04.
4.8 ★50,431 ratings
100K+Downloads
12+Age rating
116 MBApp size
FreeIn-app purchases
About this app
FREE Try Before You Buy 14 Day Trial; your App Store account is not charged by Apple during the free trial. Rated 4.8 stars with over 1.12M downloads. The trusted construction calculator used by professionals across the US and the world.
The go-to feet-inch-fraction calculator for framers, contractors, and builders. Includes Construction Master Pro and Construction Master Pro Trig in one app, with the CMPro Training Guide built in.
Built with the same core engine that powers the industry-standard advanced construction-math calculators from Calculated Industries. Award-winning tools trusted by the industry for 40 years.…
Preview
Real screenshots from the store listing.
Independent evidence report
Evidence and review signals
This is where the page changes from an app-store listing into an evidence report: findings, important reviews, pricing and a dated history.
Which version this describes
When we ran this analysis, and what the store lists now.
This analysis describes version 12.11.22 of the app, analyzed 2026-10-04 . The app may have changed since.
The store currently lists version 12.11.22, updated 2026-09-02.
What we measured
Each line is a measurement published as a measurement, never a verdict.
Each line is a measurement, published as a measurement. Where we have not looked, the line says so rather than reading as a zero.
Developer replies to reviews
Replies to at least 1 review in 20
Price in the store description
States no price and billing period
Cancelling, in the store description
Says how to cancel
Themes reported by reviewers
No theme reported
Counted from the reviews we have read for this app. "No theme reported" means no theme reached our reporting threshold — it is not a finding that nothing is wrong with this app, and we do not say it is.
Five-star share of ratings
90% or more five-star
Arithmetic on the stores' own published rating counts. It says nothing about why the ratings fall where they do.
In the package we scanned
No package has been scanned for this app, so nothing is published about what it ships. That is an absence of evidence about the app, not a finding about it.
Graded bands · predicate set 1.4 · how these are measured
What the analysis found
App-specific findings, grouped by what each one rests on. How they are graded lives on its own page.
One source only — shown, not confirmed 1
A single kind of evidence. We publish these because withholding them would be the bigger distortion, and we do not treat any of them as a finding we stand behind.
Reported by users: States a price, or offers a one-time purchase
The app's own text offers a one-time or lifetime purchase, or reviewers report that the price is stated clearly.
What we saw: Reviewers report clear pricing: raised by 8 distinct reviewers (1.6% of 501 reviews scanned)
Highlighted reviews
Representative public review excerpts shown as user reports, not Appworthy audit evidence.
“I am very surprised I have been promoting this app for many years. we just hired 3 engineers, I told them about this app. to my surprised now they charged a subscription, when I bought it manuy oons ago it was a one time purchase…”
“I love the physical calculators, but can't justify a subscription to keep one in my pocket for occasional use. If I was using it on a daily basis it might be a different story. The app seams well done, with a lot of great features. But…”
Assessment & version history
App changes and Appworthy events in one timeline.
Store listing updated to version 12.11.22.
What this app sells
Useful store-disclosed pricing, kept below the app listing.
Items shown0
Lowest—
Highest—
Google Play does not publish per-purchase prices.