Comparison

Mohr's CSA vs Intergalactic Solar System

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

Head to head
About

Mohr's CSA

This application provides an interactive tool for visualizing and analyzing stress states. It offers 2D and 3D stress analysis with detailed graphical representations and allows for direct stress transformations on Mohr's Circle. Users can also access a built-in formula sheet, export results to PDF, and save their input data.

Highlights
  • Interactive Mohr's Circle
  • 2D & 3D Stress Analysis
  • Stress Transformations
  • Built-in Formula Sheet
  • Export Results to PDF
  • Save & Restore Data
Features
Read full description

Mohr’s Circle — Stress Analysis Turn stress inputs into insight. This app makes Mohr’s Circle clear, fast, and interactive — perfect for students, educators, and practicing engineers. Enter 2D or 3D stress components, visualize Mohr’s Circle instantly, compute principal stresses and maximum shear, and export clean, shareable PDFs. Whether you’re checking homework, preparing lecture material, or validating calculations on the job, this tool helps you go from inputs to answers in seconds. What you can do • Visualize Mohr’s Circle (2D) and (3D) • Compute principal stresses (σ1, σ2) and maximum shear (τmax) • Transform stress states with angle controls and see results update live • Inspect clear σ/τ axes, principal points, and helpful annotations • Save and load stress states for quick reuse • Export neat PDFs (current view or full report) to share or archive Designed for clarity • A modern, touch-friendly interface built with SwiftUI • Real-time updates as you adjust inputs and angles • Clean labels and overlays for principal stresses, τmax, and key geometry • Helpful summaries and formula references for learning and documentation For 2D and 3D workflows • 2D: Enter σ11, σ22, τ12 and explore Mohr’s Circle with interactive visualization • 3D: View the triple-circle representation and principal stress values (σ1, σ2, σ3) Save, load, and share • Save your stress states with a title and timestamp • Load them later to resume work or compare scenarios • Export PDFs for reports, review, or teaching materials Upgrading from an older app? • One-time migration preserves your previously saved records from the legacy Core Data store (if present on device) • Migration runs safely once and avoids duplicates Who it’s for • Mechanical, civil, aerospace, and materials engineers • Students learning mechanics of materials and stress analysis • Educators preparing examples and lecture visuals • Anyone who wants a clean, focused Mohr’s Circle tool Why this app • Focused: Everything you need for Mohr’s Circle — no clutter • Practical: From input to principal stresses and τmax in seconds • Shareable: Export clean PDFs for documentation and teaching

About

Intergalactic Solar System

Explore planets, moons, and countries in this space simulator mini-game. Learn astronomy and geography aligned with next-generation science standards. Discover the Milky Way galaxy and assess your knowledge through engaging gameplay.

Highlights
  • Planet and moon exploration
  • Country geography learning
  • Milky Way galaxy view
  • Common Core aligned curriculum
  • Proficiency assessment
  • Engaging gameplay levels
Features
Read full description

Intergalactic Education introduces Intergalactic Solar System, a mini-game that teaches about planets, moons, and countries. This space simulator lets you explore celestial bodies from the viewpoint of space itself. The latest edition adds the Milky Way as an observable galaxy. Intergalactic Solar System uses next generation science standards (Common Core aligned) astronomy and geography. (Follows standards ESS1.A, ESS1.B, and CCSS.ELA-LITERACY.RH.6-8.7) Try Intergalactic Solar System! Assess proficiency in Solar System knowledge according to educational standards. Rewarding levels of gameplay maintain engagement. You will forget you were doing astronomy and geography!

Screenshots

Mohr's CSA4 screens
Intergalactic Solar System3 screens

Verdict

The call

The clearest difference is price: Intergalactic Solar System at Free against Mohr's CSA's $2.99. Intergalactic Solar System also leads on update cadence (monthly vs every 3 months) and iOS requirement (13.0 vs 26.5). Mohr's CSA's advantage is in-app purchases (none vs 1) and review sentiment (100% vs 70%). On ads 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

CostPrice · In-app purchases · Ads · Monetization

Intergalactic Solar System is free to download; Mohr's CSA costs $2.99 up front. Intergalactic Solar System sells 1 one-off in-app purchase. Mohr's CSA asks for nothing beyond the download.

UpkeepUpdate frequency

Mohr's CSA ships an update every 3 months, Intergalactic Solar System monthly. The most recent releases landed on September 22, 2026 and October 9, 2026 respectively.

Scorecard6 real differences · 4 level
Mohr's CSA versus Intergalactic Solar System: the parameters behind the verdict, then further details
ParameterMohr's CSAIntergalactic Solar System
Price$2.99Free — better
Rating—4.0 (25 ratings) — better
Positive reviews100.0% of reviews — better70.0% of reviews
Number of ratings—25 — better
Update frequencyEvery 3 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.513.0 — better
Further details — not scored
Size13 MB355 MB
Age rating4+4+
DeveloperDRH YAZILIM VE MUHENDISLIK HIZMETLERI LTD STIIntergalactic Education LLC

Customer experience

Mohr's CSA

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Intergalactic Solar System

All ratings20 ratings
Positive75.0%
Neutral5.0%
Negative20.0%
Written reviews10 reviews
Positive70.0%
Neutral10.0%
Negative20.0%

In-app purchases

None

Mohr's CSA

No in-app purchases

1 purchases

Intergalactic Solar System

One-time1
  • Access to Full Game$3.99

Questions

Is Mohr's CSA free?
Mohr's CSA costs $2.99, with no in-app purchases.
Is Intergalactic Solar System free?
Intergalactic Solar System is free to download, with in-app purchases available.
Do Mohr's CSA or Intergalactic Solar System have ads?
Neither Mohr's CSA nor Intergalactic Solar System shows ads.
Which is updated more often, Mohr's CSA or Intergalactic Solar System?
Mohr's CSA ships an update every 3 months, and Intergalactic Solar System monthly. Most recently, Mohr's CSA was updated on September 22, 2026 and Intergalactic Solar System on October 9, 2026.

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