# Mohr's Circle vs 3D Stress

The clearest difference is update cadence: 3D Stress at every 2 weeks against Mohr's Circle's every 15 months. 3D Stress also leads on price ($2.99 vs $5.99). Mohr's Circle's advantage is iOS requirement (12.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

Mohr's Circle costs $5.99 and 3D Stress $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Mohr's Circle ships an update every 15 months, 3D Stress every 2 weeks. The most recent releases landed on October 23, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Mohr's Circle | 3D Stress |
| --- | --- | --- |
| Price | $5.99 | **$2.99** |
| Rating | **[3.3 (3 ratings)](https://appshunter.io/ios/app/mohrs-circle/id395110520/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 42.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 2 weeks** |
| Monetization | Paid | — |
| Size | 8 MB | 4 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [J.R.Hobbs](https://appshunter.io/developer/395110523) | [Konstantinos Ladiellis](https://appshunter.io/developer/1516103440) |

## 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


### 3D Stress

[App page](https://appshunter.io/ios/app/3d-stress/id6503481793)

**In-app purchases:** none


## Frequently asked questions

### Is Mohr's Circle free?

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

### Is 3D Stress free?

3D Stress costs $2.99, with no in-app purchases.

### Do Mohr's Circle or 3D Stress have ads?

Neither Mohr's Circle nor 3D Stress shows ads.

### Which is updated more often, Mohr's Circle or 3D Stress?

Mohr's Circle ships an update every 15 months, and 3D Stress every 2 weeks. Most recently, Mohr's Circle was updated on October 23, 2026 and 3D Stress on October 20, 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.*