Comparison

Mohr's Circle vs Civil Engineering Pack

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

Head to head
About

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.

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
Currently charting
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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

About

Civil Engineering Pack

This comprehensive tool offers over 500 calculations for civil engineering disciplines. It covers structural design, concrete, beams, hydraulics, foundations, surveying, soil mechanics, road construction, timber, and bridges. Supports both SI and Imperial units.

Highlights
  • Over 500 civil engineering calculations
  • 12 comprehensive modules
  • Structural, concrete, and beam engineering
  • Hydraulics and waterworks analysis
  • Surveying and soil mechanics tools
  • Road, timber, and bridge construction design
  • SI and Imperial unit support
Features
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Read full description

Complete civil engineering toolkit with 12 modules, 500+ calculations, engineering references, saved history, and PDF report sharing — supporting both SI and USCS units. Perform advanced calculations across structural engineering, concrete design, hydraulics, soil mechanics, beam analysis, surveying, foundations, road construction, timber engineering, bridge engineering, and more. NEW REFERENCE LIBRARY Access integrated engineering references directly inside the app for faster design checks and field calculations: • Steel sections, ASTM/AISC material grades, rebar grades, and concrete mix classes • Beam and structural engineering references • Hydraulics and hydrology references including fluid properties, pipe materials, runoff coefficients, channel linings, and pipe fittings • Soil and earthwork references • SI and USCS engineering reference systems • Quick searchable engineering standards and properties Structural Engineering (58 Calculators) • Calculate shear capacity, critical ratios, slenderness, and safety factors • Analyze compressive and flexural stresses for compact and non-compact sections • Design structural elements subjected to axial, shear, and flexural loading • AISC-based steel design calculations Concrete Engineering (56 Calculators) • Water-cement ratio and modulus of elasticity • Tensile and compressive strength calculations for beams and columns • Reinforcement stress analysis and extreme fiber stress calculations • Concrete mix references, rebar grades, and ACI design limits Beam Engineering (56 Calculators) • Beam stress, load, and deflection analysis • Bending moments, shear forces, and section modulus calculations • Multiple material and loading condition support • W-sections and steel section references included Hydraulics & Waterworks (94 Calculators) • Capillary rise, viscosity, and kinematic viscosity calculations • Hydrostatic and hydrodynamic pressure analysis • Bernoulli equation, flow velocity, head losses, and energy calculations • Fluid properties, pipe materials, runoff coefficients, and fitting references Column Construction (56 Calculators) • Slenderness ratio and axial load capacity • Effective length factor and stability analysis • Compression member design calculations • Stress and moment interaction checks Foundations & Piles • Pile capacity and settlement calculations • Stress distribution and soil bearing analysis • Load-bearing capacity evaluation for different soil conditions • Deep foundation engineering tools Surveying (33 Calculators) • Inclination and temperature corrections • Error propagation and probable error calculations • Survey measurement adjustment tools • Standard deviation analysis for survey data Soil Mechanics & Earthworks (60 Calculators) • Void ratio, porosity, and degree of saturation • Plasticity index and shrinkage index calculations • Relative density and compaction analysis • Soil property references and earthwork engineering tools Roads & Highway Construction (37 Calculators) • Circular and parabolic curve design • Radius, tangent, chord, and superelevation calculations • External distance and median line analysis • Highway geometric design tools Timber Engineering (55 Calculators) • Beam section and fiber stress analysis • Horizontal shear stress calculations • Radius of gyration and moment of inertia • Timber structural design calculations Bridge Engineering (58 Calculators) • Bridge load distribution and stress analysis • Dynamic load factor calculations • Truss, suspension, and beam bridge calculations • Moment and shear capacity analysis Unit Converters (32 Parameters) • Pressure, area, force, energy, velocity, and more • Fast SI ↔ Imperial conversions • Engineering-focused unit conversion tools

Screenshots

Mohr's Circle4 screens
Civil Engineering Pack4 screens

Verdict

The call

The clearest difference is price: Mohr's Circle at $5.99 against Civil Engineering Pack's $19.99. Mohr's Circle also leads on review sentiment (43% vs 0%) and iOS requirement (12.0 vs 16.0). Civil Engineering Pack's advantage is rating (4.3 vs 3.3) and ratings volume (21 vs 3). On update cadence, ads, in-app purchases and monetization model 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

Mohr's Circle costs $5.99 and Civil Engineering Pack $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Civil Engineering Pack holds the better App Store score, 4.3 against 3.3. That said, the two scores are not equally well evidenced: Civil Engineering Pack has 21 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 43% of Mohr's Circle's written reviews are positive against 0% of Civil Engineering Pack's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Mohr's Circle ships an update every 15 months, Civil Engineering Pack every 8 months. The most recent releases landed on September 16, 2026 and September 6, 2026 respectively.

Scorecard5 real differences · 6 level
Mohr's Circle versus Civil Engineering Pack: the parameters behind the verdict, then further details
ParameterMohr's CircleCivil Engineering Pack
Price$5.99 — better$19.99
Rating3.3 (3 ratings)4.3 (21 ratings) — better
Positive reviews42.9% of reviews — better0.0% of reviews
Number of ratings321 — better
Update frequencyEvery 15 monthsEvery 8 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank#191#186 — better
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS12.0 — better16.0
Further details — not scored
Size8 MB40 MB
Age rating4+4+
DeveloperJ.R.HobbsV PUGAZHENTHI

Customer experience

Mohr's Circle

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews7 reviews
Positive42.9%
Neutral28.6%
Negative28.6%

Civil Engineering Pack

All ratings21 ratings
Positive81.0%
Neutral9.5%
Negative9.5%
Written reviews2 reviews
Positive0.0%
Neutral50.0%
Negative50.0%

In-app purchases

None

Mohr's Circle

No in-app purchases

None

Civil Engineering Pack

No in-app purchases

Questions

Is Mohr's Circle free?
Mohr's Circle costs $5.99, with no in-app purchases.
Is Civil Engineering Pack free?
Civil Engineering Pack costs $19.99, with no in-app purchases.
Which has better reviews, Mohr's Circle or Civil Engineering Pack?
Civil Engineering Pack is rated higher. Mohr's Circle averages 3.3 out of 5 from 3 ratings, while Civil Engineering Pack averages 4.3 from 21 ratings.
Do Mohr's Circle or Civil Engineering Pack have ads?
Neither Mohr's Circle nor Civil Engineering Pack shows ads.
Which is updated more often, Mohr's Circle or Civil Engineering Pack?
Mohr's Circle ships an update every 15 months, and Civil Engineering Pack every 8 months. Most recently, Mohr's Circle was updated on September 16, 2026 and Civil Engineering Pack on September 6, 2026.
Which is more popular, Mohr's Circle or Civil Engineering Pack?
Mohr's Circle currently peaks at #191 in the App Store charts, and Civil Engineering Pack at #186. Chart position reflects recent download velocity rather than total install base.

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