Comparison

Stress Concentration Factors 2 vs Physics AI

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

Head to head
About

Stress Concentration Factors 2

This application calculates stress concentration factors for various geometric discontinuities in engineering. It provides nominal and peak stress values, displays relevant equations, and allows users to easily share results via email or print them.

Highlights
  • Calculates Stress Concentration Factor
  • Metric and English Units
  • Nominal and Peak Stress Calculation
  • Displays Equations
  • Email/Print Results
  • 26 Geometric Solutions
Features
Read full description

Sometimes simple stress formulae are not enough. The real peak stresses in hardware occurs at geometric discontinuities such as notches, holes, & filets. To get an accurate stress value, you need a stress concentration factor. This app makes that easy. Along with stress concentration factors, this app calculates the nominal and peak stresses, displays the equations, & easily prints or shares via email your result with a couple of taps. Stress Concentration Factors 2 Features: - Calculates the Stress Concentration Factor - Units in Metric and English Systems - Nominal Stress - Peak Stress - Designed for use on the iPhone, iPod Touch, & iPad - Printing Capability - Ability to email a PDF of the Geometry, Inputs, Equations, & Results Stress Concentration Factors 2 calculates the stress concentration factors & displays the equations for 26 different geometries including: Solutions: • Single U Notch in tension • Single U Notch in bending • Double U Notch in tension, bending, & out of plane bending • Single V Notch in bending • Infinite Row of U Notches in tension • Central Hole in tension • Central Hole in bending, & out of plane bending • Off Center Hole in tension & bending • Rectangular Hole in tension • Infinite Row of Holes in parallel & normal tension • Square Shoulder Fillet in Tension • Square Shoulder Fillet in Bending • U Notch Circular Shaft in tension • U Notch Circular Shaft bending & torsion • Stepped Circular Shaft in tension, bending, & torsion • Circular Shaft with a Radial Hole in tension, bending & torsion Check out our other engineering apps by searching the App Store for: • Pressure Vessel Pro • Moments of Inertia • Mohr's Circle • Stress Intensity Factors Pro or search J.R.Hobbs to see them all.

About

Physics AI

This app acts as a physics problem solver, offering step-by-step solutions for various physics questions. Users can upload or photograph problems, including diagrams and handwritten notes, to receive detailed mathematical explanations. It covers a wide range of physics topics for students at all levels.

Highlights
  • Photo upload for physics problems
  • Step-by-step mathematical solutions
  • Covers high school to doctoral research
  • Copy and share solutions
  • Handles multiple choice, word-based, and diagram problems
Features
Read full description

Unlock the secrets of physics with Physics AI, your ultimate physics problem solver! Are you stumped by a complex physics question? Seeking clear, step-by-step explanations? Turn to Physics AI, your academic superhero in the realm of physics. Physics AI expertly tackles an array of physics queries – be it multiple choice, word-based, diagrams, math-centric, or any other type. Simply snap a photo or upload your question, and watch as Physics AI swiftly deciphers and guides you through a comprehensive solution. EXCEPTIONAL FEATURES Effortlessly upload or capture photos of both handwritten and digital physics problems. Seamlessly copy and disseminate intricate solutions. Comprehensive coverage of physics topics, catering to students from high school through to doctoral research. Detailed, step-by-step mathematical solutions. Experience the app's capabilities with a complimentary trial period. Your use of Physics AI signifies your agreement to our Terms of Use and Privacy Policy. A subscription is required to access the contents of the app. Terms of use: https://renaissanceapps.com/terms-conditions Privacy Policy: https://renaissanceapps.com/privacy-policy

Screenshots

Stress Concentration Factors 24 screens
Physics AI4 screens

Verdict

The call

The clearest difference is price: Physics AI at Free against Stress Concentration Factors 2's $5.99. Physics AI also leads on rating (4.5 vs 3.0) and update cadence (fortnightly vs every 38 months). Stress Concentration Factors 2's advantage is in-app purchases (none vs 2) and ads (none vs shown). On 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

Physics AI is free to download; Stress Concentration Factors 2 costs $5.99 up front. Physics AI sells 2 in-app purchases, starting at $5.99 per 7 days. Stress Concentration Factors 2 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Physics AI holds the better App Store score, 4.5 against 3.0. That said, the two scores are not equally well evidenced: Physics AI has 289 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of Stress Concentration Factors 2's written reviews are positive against 25% of Physics AI's.

UpkeepUpdate frequency

Stress Concentration Factors 2 ships an update every 38 months, Physics AI fortnightly. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

Scorecard9 real differences · 1 level
Stress Concentration Factors 2 versus Physics AI: the parameters behind the verdict, then further details
ParameterStress Concentration Factors 2Physics AI
Price$5.99Free — better
Rating3.0 (1 ratings)4.5 (289 ratings) — better
Positive reviews0.0% of reviews25.0% of reviews — better
Number of ratings1289 — better
Update frequencyEvery 38 monthsFortnightly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaid — betterSubscription
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better16.0
Further details — not scored
Size11 MB16 MB
Age rating4+4+
DeveloperJ.R.HobbsRenaissance Apps LLC

Customer experience

Stress Concentration Factors 2

All ratings1 ratings
Positive0.0%
Neutral100.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

Physics AI

All ratings287 ratings
Positive86.8%
Neutral4.5%
Negative8.7%
Written reviews12 reviews
Positive25.0%
Neutral8.3%
Negative66.7%

Bugs and requests

Stress Concentration Factors 2

Not enough reviews yet to summarise bugs or requests.

Physics AI

Reported bugs

4 issues
  • App shows same question repeatedly
  • App not letting user cancel subscription
  • App keeps loading instead of solving equations
  • App keeps prompting for subscription when advertised as free

Requested features

2 requests
  • Ability to talk to AI model for better photo input
  • Improvement in AI interaction for photo questions

In-app purchases

None

Stress Concentration Factors 2

No in-app purchases

2 purchases

Physics AI

Subscriptions2
  • Physics AI Weekly Sub3 Days trial$5.997 Days
  • Physics AI - Yearly Sub$34.991 Year

Questions

Is Stress Concentration Factors 2 free?
Stress Concentration Factors 2 costs $5.99, with no in-app purchases.
Is Physics AI free?
Physics AI is free to download, with in-app purchases available.
Which has better reviews, Stress Concentration Factors 2 or Physics AI?
Physics AI is rated higher. Stress Concentration Factors 2 averages 3.0 out of 5 from 1 ratings, while Physics AI averages 4.5 from 289 ratings.
Do Stress Concentration Factors 2 or Physics AI have ads?
Physics AI shows ads; Stress Concentration Factors 2 does not.
Which is updated more often, Stress Concentration Factors 2 or Physics AI?
Stress Concentration Factors 2 ships an update every 38 months, and Physics AI fortnightly. Most recently, Stress Concentration Factors 2 was updated on November 3, 2026 and Physics AI on October 30, 2026.

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