Comparison

StrucMaster HD vs Polygon

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

Head to head
About

StrucMaster HD

This app allows users to define and analyze structural mechanics problems on their iPad. It offers powerful functions for internal force diagrams, dynamics, influence lines, and stability analysis, with detailed solving steps provided by AI. Users can create complex structures with non-integer element lengths.

Highlights
  • Define custom structures
  • Internal force diagram analysis
  • Dynamics and stability analysis
  • Influence line calculations
  • AI-powered detailed solving steps
  • MultiSelect command for complex structures
  • Offline analysis
Read full description

【Introduction】 You will enjoy the procedure of defining your own structure with only several steps and have it analyzed by this StrucMaster HD. Powerful functions inside can deal with internal force diagram, dynamics, influence line and stability analysis. The Intelligence part can provide detailed solving steps. The MultiSelect command can help you establish the large structure just as in CAD, it can also help designers define structures with non-integer length elements. All of the procedures are done by the artificial intelligence in your iPad, no matter whether you are connected to the Internet. Convenient, powerful, no delays, what are you waiting for? Actually, you can download another app, named StrucMaster, if you want to analyze the structure on your iPhone. But the iPad version is more elegant, which takes us most of efforts. If you have any question, you can contact us by our e-mail address structuremaster@163.com or tell us in Facebook. Our Facebook website: https://www.facebook.com/StrucMaster

About

Polygon

Calculate complex properties of any polygonal figure, including centroids, moments of inertia, and perimeter. Simply input vertex coordinates for instant results, saving significant time on tedious calculations.

Highlights
  • Polygon Centroids
  • Moments of Inertia (Ix, Iy, Ixy)
  • Polar Moment of Inertia
  • Radius of Gyration
  • Principal Moments of Inertia
  • Area and Perimeter
  • Side Lengths
  • Hollow Sections
Features
Read full description

Polygon will allow you to calculate complex and tedious calculations related to any polygonal figure, whether concave or convex, regular or irregular, in a simple and instantaneous way: - Polygon Centroids - Moments of Inertia Ix, Iy, Ixy - Polar Moment of Inertia - Radius of gyration - Principal Moments of Inertia (Iu, Iv and their respective angles) - Area and Perimeter of the polygon - Length of each side of the polygon - Even incorporate hollow sections - Rotate the axes to a custom angle - Define new custom axes at any point - and much more You just have to enter the coordinates of the vertices of your polygon and press the button and it will immediately calculate all the previous properties, saving valuable time. Subscription Terms: Payment will be charged to Itunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turnerd off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hour prior to the end of the current period, and identify the cost of the renewal. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Setting after purchase. No cancellation of the current subscription is allowed during active subscription period. For in-app purchases and subscriptions, see Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Polygon4 screens

Verdict

The call

The clearest difference is rating: Polygon at 3.0 against StrucMaster HD's 2.3. Polygon also leads on update cadence (weekly vs every 6 months). StrucMaster HD's advantage is monetization model (free vs freemium) and ratings volume (3 vs 1). On price, ads, in-app purchases and device support 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. StrucMaster HD sells 1 one-off in-app purchase and Polygon sells 4 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Polygon holds the better App Store score, 3.0 against 2.3. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

UpkeepUpdate frequency

StrucMaster HD ships an update every 6 months, Polygon weekly. The most recent releases landed on October 10, 2026 and September 20, 2026 respectively.

Scorecard5 real differences · 5 level
StrucMaster HD versus Polygon: the parameters behind the verdict, then further details
ParameterStrucMaster HDPolygon
PriceFreeFree
Rating2.3 (3 ratings)3.0 (1 ratings) — better
Positive reviews50.0% of reviews—
Number of ratings3 — better1
Update frequencyEvery 6 monthsWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFreemium
DevicesiPadiPhone, iPad — better
Requires iOS8.0 — better17.0
Further details — not scored
Size86 MB29 MB
Age rating4+4+
Developer颖达 陈Adrian Caballero

Customer experience

StrucMaster HD

All ratings3 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Polygon

All ratings1 ratings
Positive0.0%
Neutral100.0%
Negative0.0%

In-app purchases

1 purchases

StrucMaster HD

One-time1
  • Advanced Function Forever$3.99
4 purchases

Polygon

Subscriptions3
  • Pro Access$2.991 Month
  • Pro Access$4.996 Months
  • Pro Access$6.991 Year
One-time1
  • Pro Access$9.99

Questions

Is StrucMaster HD free?
StrucMaster HD is free to download, with in-app purchases available.
Is Polygon free?
Polygon is free to download, with in-app purchases available.
Which has better reviews, StrucMaster HD or Polygon?
Polygon is rated higher. StrucMaster HD averages 2.3 out of 5 from 3 ratings, while Polygon averages 3.0 from 1 ratings.
Do StrucMaster HD or Polygon have ads?
Neither StrucMaster HD nor Polygon shows ads.
Which is updated more often, StrucMaster HD or Polygon?
StrucMaster HD ships an update every 6 months, and Polygon weekly. Most recently, StrucMaster HD was updated on October 10, 2026 and Polygon on September 20, 2026.

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