Comparison

Psychrometric Chart vs Easy Build for iPhone

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

Head to head
About

Psychrometric Chart

An interactive tool for HVAC engineers to create and manipulate psychrometric charts. Model various air processes, add and adjust state points with live property updates, and save multiple charts. Export your designs as PDFs or via AirPrint.

Highlights
  • Interactive psychrometric charts
  • Model air mixing and heating/cooling
  • Live state point adjustment
  • SI and IP unit support
  • Save and manage multiple charts
  • Export charts as PDF
  • AirPrint compatibility
Features
Read full description

Interactive, graphical psychrometric chart app for HVAC engineers and designers. Allows you to create and manipulate charts and state points with the touch of your finger(s). Processes that can be modeled include: • An individual state point. • Air mixing. • Sensible heating. • Sensible cooling. • Cooling coils. • Other processes by connecting state points. Add new state points by double tapping anywhere on the chart. Hold and drag existing state points to move them on the graph, with properties values updating live to aid you in setting them to the right value. Works in both SI and IP units. Allows you to create and save multiple charts. Properties and energy change for connected points are calculated and displayed live. Share your charts by exporting a PDF file or sending to an AirPrint device. Works on both the iPhone and iPad, but best used on the larger screen of the iPad. ------ We would very much like your feedback! Suggestions, complements, complaints, bug reports etc.: http://www.pheinex.com/contact/ If you like this app, please do not forget to rate it in the App Store! ----- Notes: This application (App) is provided for use by qualified HVAC engineers and designers in the design of air handling systems and is not a substitute for appropriate design services. When in doubt, contact a design

About

Easy Build for iPhone

This app helps construction professionals and DIYers accurately measure and calculate dimensions on plans. It allows users to upload drawings, mark up measurements, and export annotated plans for collaboration. Save time and money with efficient take-offs for quotes.

Highlights
  • Upload and measure PDF drawings
  • Calculate missing measurements
  • Measure perimeters and areas
  • Mark up plans with text and drawings
  • Export annotated plans
  • Supports metric and imperial units
Features
Read full description

The most accurate scale and measurement app. Having troubles with your plans on-site? Easy Build is your answer. Getting frustrated with squaring up your set out? Can’t find or calculate a measurement? With a couple of taps, Easy Build will find your missing measurement. Easy Build provides an inbuilt perimeter and area measuring tool, there will be no more dramas calculating those odd-shaped builds with no area on the plan. Easily share marked-up plans with colleagues or trades by exporting directly to email, print or iTunes. Work more efficiently. Easy Build makes take-offs for quotes quick, easy and accurate. You will wonder how you ever have done without it. Easy Build will save you time and money! √ Very easy to use √ Upload your PDF drawings by directing the file from your email or Itunes account. Open it in the 'Easybuild' app and recreate your project. √ Measure perimeters and areas accurate and fast no matter the shape √ Measure in diagonals quick and easy √ Mark and measure in those missing measurements ready for site √ Colour code different areas for a clear explanation √ Quickly and accurately place anchor points with the help of a magnifying glass √ Onboard calculator available √ Draw custom lines and rectangles √ Create pen and highlighter marks with the simple drag of a finger √ Quickly add and edit your own text annotations √ Fast and responsive, even for complex PDFs √ Export annotated PDFs direct to email, print or iTunes √ Create and save as many projects as you like √ Supports both Metric and Imperial units Update for the Lite version coming soon. This will fix the crashing with the new version iOS when trying to open the sample PDF. If you have purchased this. Thank you and please delete the Lite Version to prevent confusion when using "Open In" Visit us online! www.easybuildapplication.com Like us on Facebook EasyBuild app.

Screenshots

Psychrometric Chart2 screens
Easy Build for iPhone4 screens

Verdict

The call

The clearest difference is review sentiment: Easy Build for iPhone at 100% against Psychrometric Chart's 33%. Easy Build for iPhone also leads on price ($12.99 vs $59.99) and rating (5.0 vs 4.4). Psychrometric Chart's advantage is in-app purchases (none vs 2) and update cadence (every 3 months vs every 20 months). On ads and monetization model 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

Psychrometric Chart costs $59.99 and Easy Build for iPhone $12.99 up front. Easy Build for iPhone sells 2 in-app purchases, starting at $12.99 per month. Psychrometric Chart asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Easy Build for iPhone holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Psychrometric Chart has 35 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 33% of Psychrometric Chart's written reviews are positive against 100% of Easy Build for iPhone's.

UpkeepUpdate frequency

Psychrometric Chart ships an update every 3 months, Easy Build for iPhone every 20 months. The most recent releases landed on October 24, 2026 and October 26, 2026 respectively.

Scorecard8 real differences · 2 level
Psychrometric Chart versus Easy Build for iPhone: the parameters behind the verdict, then further details
ParameterPsychrometric ChartEasy Build for iPhone
Price$59.99$12.99 — better
Rating4.4 (35 ratings)5.0 (1 ratings) — better
Positive reviews33.3% of reviews100.0% of reviews — better
Number of ratings35 — better1
Update frequencyEvery 3 months — betterEvery 20 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidPaid
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPod
Requires iOS15.012.0 — better
Further details — not scored
Size32 MB5 MB
Age rating4+4+
DeveloperPheinex, LLCEasy Build Application Pty Ltd

Customer experience

Psychrometric Chart

All ratings34 ratings
Positive82.4%
Neutral5.9%
Negative11.8%
Written reviews6 reviews
Positive33.3%
Neutral16.7%
Negative50.0%

Easy Build for iPhone

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Psychrometric Chart

No in-app purchases

2 purchases

Easy Build for iPhone

Subscriptions2
  • EasyBuild Monthly$12.991 Month
  • EasyBuild Annual$39.991 Year

Questions

Is Psychrometric Chart free?
Psychrometric Chart costs $59.99, with no in-app purchases.
Is Easy Build for iPhone free?
Easy Build for iPhone costs $12.99, and also offers in-app purchases.
Which has better reviews, Psychrometric Chart or Easy Build for iPhone?
Easy Build for iPhone is rated higher. Psychrometric Chart averages 4.4 out of 5 from 35 ratings, while Easy Build for iPhone averages 5.0 from 1 ratings.
Do Psychrometric Chart or Easy Build for iPhone have ads?
Neither Psychrometric Chart nor Easy Build for iPhone shows ads.
Which is updated more often, Psychrometric Chart or Easy Build for iPhone?
Psychrometric Chart ships an update every 3 months, and Easy Build for iPhone every 20 months. Most recently, Psychrometric Chart was updated on October 24, 2026 and Easy Build for iPhone on October 26, 2026.

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