Mohr's Circle vs Statistics Calculator++
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
Statistics Calculator++
Perform advanced statistical analysis, including regression and probability distributions, with ease. Visualize data through plots and tables, and save or import datasets from spreadsheets. Offers a wide range of calculations beyond core statistics.
- Data entry and analysis table
- Box and whisker plots and histograms
- Linear, logarithmic, exponential, power, quadratic regressions
- Save and import data from Excel/Numbers
- Normal, t, Chi-Squared, F, Binomial, Poisson distributions
- Confidence intervals and hypothesis tests
- Fraction manipulation, angle conversions, solvers
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Simplify your statistics with Statistics Calculator++ Perform powerful statistical analysis without needing a manual. Enter your data easily using "Add X," "Add Y," and "Add Z" buttons, and let Statistics Calculator++ handle the rest. Analyze results in a clear table, including sum, mean, standard deviation, quartiles, and more. Visualize your data with box and whisker plots and histograms. Powerful regression analysis: Choose from linear, logarithmic, exponential, power, and quadratic regressions. The intuitive interface simplifies selecting models and calculating predictions for x and y values. View residuals, residual sum of squares, and how the regression model fits your data in a graph. Save and import data with ease: Store multiple data lists and use them in calculations effortlessly. Import data directly from Microsoft Excel or Apple Numbers. Plus, your data is always saved within the app, so you never lose it. More than just statistics: Probability distributions: Normal, Student's t, Chi-Squared, F, Binomial, Poisson, Geometric, Beta, and Gamma. Confidence intervals and hypothesis tests: Step-by-step explanations for common statistical tests. Advanced calculations: Fraction manipulation, angle conversions, permutation/combination, LCM/GCD, prime factorization, quadratic solver, system of linear equations solver, rectangular/polar conversions, dice rolling. Statistics Calculator++ is a powerful and user-friendly tool for: Students Scientists Engineers Anyone who needs statistical analysis Download Statistics Calculator++ today and experience the simplicity of powerful statistics!
Screenshots
Verdict
The clearest difference is rating: Statistics Calculator++ at 4.1 against Mohr's Circle's 3.3. Statistics Calculator++ also leads on update cadence (every 3 weeks vs every 15 months) and ratings volume (309 vs 3). Mohr's Circle's advantage is chart position (#191 vs unranked) and 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 Statistics Calculator++ $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Statistics Calculator++ holds the better App Store score, 4.1 against 3.3. That said, the two scores are not equally well evidenced: Statistics Calculator++ has 309 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 43% of Mohr's Circle's written reviews are positive against 63% of Statistics Calculator++'s.
Mohr's Circle ships an update every 15 months, Statistics Calculator++ every 3 weeks. The most recent releases landed on September 16, 2026 and September 24, 2026 respectively.
| Parameter | Mohr's Circle | Statistics Calculator++ |
|---|---|---|
| Price | $5.99 | $0.99 — better |
| Rating | 3.3 (3 ratings) | 4.1 (309 ratings) — better |
| Positive reviews | 42.9% of reviews | 62.5% of reviews — better |
| Number of ratings | 3 | 309 — better |
| Update frequency | Every 15 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #191 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone, 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 | Dogahe |
Customer experience
Mohr's Circle
Statistics Calculator++
Bugs and requests
Mohr's Circle
Not enough reviews yet to summarise bugs or requests.
Statistics Calculator++
Reported bugs
6 issues- App freezes after brief use
- Statistics section won't open
- Incompatibility with iOS 7
- Random number generator produces predetermined sequences
- Landscape/portrait mode switching issues
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- Missing advertised features (nCr function)
Requested features
10 requests- User manual or tutorial documentation
- Ability to input custom quantiles and critical values
- Support for Z-score input in normal distribution
- Streamlined data clearing process
- Quadratic and advanced regression options
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- Graphing for all input/output scenarios
- Direct proportion input without requiring trial counts
- Improved random number generator with proper seeding
- Plotting of regression models
- Two-sided interval calculations for alpha values
In-app purchases
Mohr's Circle
No in-app purchases
Statistics Calculator++
No in-app purchases
Questions
Is Mohr's Circle free?
Is Statistics Calculator++ free?
Which has better reviews, Mohr's Circle or Statistics Calculator++?
Do Mohr's Circle or Statistics Calculator++ have ads?
Which is updated more often, Mohr's Circle or Statistics Calculator++?
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