Mohr's Circle vs 3D Stress
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mohr's Circle
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.
- 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)
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Do you need to perform a Mohr's Circle calculation? Would you like to make sure you Mohr's Circle diagram is correct? With the power of your iOS device and this app, you can do this quickly and easily. (5 Stars) "Perfect…Great tool, great app!" -The fever, the focus Mohr's Circle Calculates: ● 2D Plane Stress Mohr's Circle Solutions ● Max Stress ● Min Stress ● Max Shear Stress ● Average Stress ● Principal Stress Plane Angle ● Max Shear Stress Plane Angle ● The normal stress at an arbitrary angle ● The tangential stress at an arbitrary angle ● The shear stress at an arbitrary angle Mohr's Circle Graphs 4 Views Including: ● Mohr's Circle Diagram ● Stress State Rotated to the Principal Stress Plane ● Stress State Rotated to the Max Shear Stress Plane ● Stress State Rotated to an arbitrary angle Mohr's Circle Features: ● Universal App (Designed for both the iPhone and iPad) ● Share your results via a printout or email ● View the equations used to calculate the results ● Store as many stress states as you want for future reference Units Included! Independently set input and output units both English and Metric. Check out our other engineering apps by searching the App Store for: • Pressure Vessel Pro • Moments of Inertia • Stress Concentrations Pro • Stress Intensity Factors Pro or search J.R.Hobbs to see them all. AppStore.com/JRHobbs
3D Stress
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Explore and understand 3D material stress through Mohr's circle. Calculates principal stresses, maximum shear stress and Von Mises stress
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Mohr's Circle | 3D Stress |
|---|---|---|
| Price | $5.99 | $2.99 — better |
| Rating | 3.3 (3 ratings) — better | — |
| Positive reviews | 42.9% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 15 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 8 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | J.R.Hobbs | Konstantinos Ladiellis |
In-app purchases
Mohr's Circle
No in-app purchases
3D Stress
No in-app purchases
Questions
Is Mohr's Circle free?
Is 3D Stress free?
Do Mohr's Circle or 3D Stress have ads?
Which is updated more often, Mohr's Circle or 3D Stress?
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