# Mohr's Circle vs StrucMaster HD

The clearest difference is price: StrucMaster HD at Free against Mohr's Circle's $5.99. StrucMaster HD also leads on update cadence (every 6 months vs every 15 months) and iOS requirement (8.0 vs 12.0). Mohr's Circle's advantage is rating (3.3 vs 2.3) and in-app purchases (none vs 1). On review sentiment, ratings volume and ads there is nothing between them.

StrucMaster HD is free to download; Mohr's Circle costs $5.99 up front. StrucMaster HD sells 1 one-off in-app purchase. Mohr's Circle asks for nothing beyond the download.

Mohr's Circle holds the better App Store score, 3.3 against 2.3. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews complicate that: 43% of Mohr's Circle's written reviews are positive against 50% of StrucMaster HD's, so the app with the better star average is not the one people write more warmly about.

Mohr's Circle ships an update every 15 months, StrucMaster HD every 6 months. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Mohr's Circle | StrucMaster HD |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | **[3.3 (3 ratings)](https://appshunter.io/ios/app/mohrs-circle/id395110520/reviews)** | [2.3 (3 ratings)](https://appshunter.io/ios/app/strucmaster-hd/id1091326709/reviews) |
| Number of ratings | 3 | 3 |
| Positive reviews | 42.9% of reviews | **50.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 6 months** |
| Monetization | Paid | **Free** |
| Size | 8 MB | 86 MB |
| Requires iOS | 12.0 | **8.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [J.R.Hobbs](https://appshunter.io/developer/395110523) | [颖达 陈](https://appshunter.io/developer/1058507663) |

## What reviewers say

### Mohr's Circle

[App page](https://appshunter.io/ios/app/mohrs-circle/id395110520)

This application assists users in performing Mohr's Circle calculations and verifying their diagrams. It offers solutions for 2D plane stress, calculates various stress values, and generates graphical representations of stress states. Users can also share results and store multiple stress states.

**Highlights:** 2D Plane Stress Mohr's Circle Solutions, Max, Min, and Shear Stress Calculations, Principal Stress Plane Angle, Mohr's Circle Diagram, Stress State Rotation Views, Shareable Results, Unit Conversion (English/Metric)

**Features:** Vision Pro support

**In-app purchases:** none


### StrucMaster HD

[App page](https://appshunter.io/ios/app/strucmaster-hd/id1091326709)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advanced Function Forever | $3.99 | one-time |


## Frequently asked questions

### Is Mohr's Circle free?

Mohr's Circle costs $5.99, with no in-app purchases.

### Is StrucMaster HD free?

StrucMaster HD is free to download, with in-app purchases available.

### Which has better reviews, Mohr's Circle or StrucMaster HD?

Mohr's Circle is rated higher. Mohr's Circle averages 3.3 out of 5 from 3 ratings, while StrucMaster HD averages 2.3 from 3 ratings.

### Do Mohr's Circle or StrucMaster HD have ads?

Neither Mohr's Circle nor StrucMaster HD shows ads.

### Which is updated more often, Mohr's Circle or StrucMaster HD?

Mohr's Circle ships an update every 15 months, and StrucMaster HD every 6 months. Most recently, Mohr's Circle was updated on October 3, 2026 and StrucMaster HD on October 10, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*