Comparison

TopOpt 3D vs Mechanical Components

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

Head to head
About

TopOpt 3D

Perform 3D structural optimization using topology optimization on your iPad or iPhone. Adjust loads, supports, volume fractions, and grid sizes to observe design evolution. Experiment with different parameters to discover new minimums.

Highlights
  • 3D topology optimization
  • Adjustable loads and supports
  • Variable volume fractions
  • Experiment with grid sizes
  • Design evolution visualization
Features
Read full description

Use your iPad/iPhone to perform structural optimization by the topology optimization method in 3D ! Move loads and supports and watch the design evolve to a new minimum. Experiment with different volume fractions and grid sizes and see what happens.

About

Mechanical Components

Test your knowledge of mechanical components with interactive quizzes. Features high-quality images, instant feedback, and multiple difficulty levels to help you master engineering parts. Ideal for students, DIY enthusiasts, and professionals.

Highlights
  • Interactive quizzes on mechanical parts
  • High-quality component images
  • Instant feedback and facts
  • Multiple difficulty levels
  • Learn and master engineering components
Features
Read full description

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Test your knowledge of mechanical components and become an expert with Mechanical Components Trivia! Whether you're an engineering student, a DIY enthusiast, or a mechanical professional, this app is your ultimate tool to identify, learn, and master mechanical parts. Features: Interactive Quizzes: Challenge yourself with hundreds of trivia questions on mechanical components like gears, valves, bearings, and more. High-Quality Images: Each quiz features crisp, detailed images of components for better learning and identification. Learn-as-You-Play: Get instant feedback and learn interesting facts about each part. Multiple Difficulty Levels: Progress from beginner to expert as you tackle increasingly challenging quizzes. Expand your mechanical knowledge, sharpen your skills, and have fun along the way! Perfect for preparing for exams, interviews, or simply satisfying your curiosity about the fascinating world of mechanical engineering. Download Mechanical Components today and see how many components you can identify like: Screw Nut Bolt Washer Locknut Rivet Pin Cotter pin Clevis pin Spring washer Split pin Lock washer Flat washer Circlip Retaining ring Key (mechanical) Woodruff key Hex nut Wing nut Eye bolt Anchor bolt Threaded rod Set screw Self-tapping screw Machine screw Shoulder bolt Carriage bolt Hex bolt Flange bolt Square bolt Eyelet Dowel pin Taper pin Snap ring Hose clamp Pipe clamp Hose barb Grease nipple Shim Spacer Bushing Sleeve bearing Plain bearing Thrust washer Spherical bearing Ball bearing Roller bearing Tapered roller bearing Needle roller bearing Thrust bearing Linear bearing Cam follower Ball transfer unit Guide rail Shaft collar Shaft Axle Keyed shaft Splined shaft Gear shaft Flexible coupling Rigid coupling Jaw coupling Bellows coupling Oldham coupling Universal joint Ball joint Linear guide Linear rail Linear actuator Rotary actuator Pneumatic cylinder Hydraulic cylinder Solenoid Gas spring Tension spring Compression spring Leaf spring Belleville spring Torsion spring Constant force spring Extension spring Coil spring Conical spring Wave spring Spiral spring Retainer spring Spring pin Belleville washer Vibration isolator Shock absorber Damper Diaphragm Bellows O-ring Gasket Seal Lip seal Mechanical seal Oil seal Piston ring Wear ring Dust cap Labyrinth seal V-seal Shaft seal Rubber gasket Foam gasket Metal gasket Air filter Fuel filter Oil filter Coolant filter Hydraulic filter Breather filter Inline filter Gear Spur gear Helical gear Bevel gear Worm gear Rack and pinion Planetary gear Crown gear Internal gear Gearbox Gear reducer Pinion Idler gear Gear train Clutch Electromagnetic clutch Friction clutch Dog clutch Centrifugal clutch Fluid coupling Torque converter Transmission Differential CV joint Propeller shaft Drive shaft Flywheel Crankshaft Camshaft Rocker arm Connecting rod Piston Valve Valve seat Valve guide Valve spring Valve lifter Valve stem seal Valve cap Butterfly valve Check valve Ball valve Gate valve Globe valve Needle valve Diaphragm valve Pressure relief valve Safety valve Solenoid valve Pilot valve Flow control valve Directional control valve Hydraulic pump Gear pump Vane pump Piston pump Diaphragm pump Rotary pump Centrifugal pump Axial flow pump Peristaltic pump Screw pump Submersible pump Reciprocating pump Hydraulic motor Pneumatic motor Electric motor Stepper motor Servo motor Linear motor Induction motor Synchronous motor DC motor Brushless motor Brush motor Thermocouple Strain gauge Load cell Proximity sensor Pressure sensor Temperature sensor Position sensor Encoder Resolver Tachometer Potentiometer Thermistor RTD sensor Flow meter Level sensor Accelerometer Vibration sensor Gyroscope Humidity sensor Airflow sensor Shock sensor Proximity switch Limit switch Toggle switch Push-button Slide switch Rotary switch DIP switch Rocker switch Lever switch Tactile switch Relays Contactors

Screenshots

TopOpt 3D1 screens
Mechanical Components4 screens

Verdict

The call

The clearest difference is rating: TopOpt 3D at 3.7 against Mechanical Components's 3.0. TopOpt 3D also leads on in-app purchases (none vs 4) and update cadence (every 6 weeks vs every 7 months). On price, ratings volume and ads 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

Both are free to download. Mechanical Components sells 4 in-app purchases, starting at $7.99 per 7 days. TopOpt 3D asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

TopOpt 3D holds the better App Store score, 3.7 against 3.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

UpkeepUpdate frequency

TopOpt 3D ships an update every 6 weeks, Mechanical Components every 7 months. The most recent releases landed on October 4, 2026 and October 2, 2026 respectively.

Scorecard6 real differences · 4 level
TopOpt 3D versus Mechanical Components: the parameters behind the verdict, then further details
ParameterTopOpt 3DMechanical Components
PriceFreeFree
Rating3.7 (3 ratings) — better3.0 (2 ratings)
Positive reviews0.0% of reviews—
Number of ratings3 — better2
Update frequencyEvery 6 weeks — betterEvery 7 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS11.0 — better17.0
Further details — not scored
Size103 MB49 MB
Age rating4+4+
DeveloperDTU Mechanical EngineeringForwa Elade Wunde

Customer experience

TopOpt 3D

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Mechanical Components

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

TopOpt 3D

No in-app purchases

4 purchases

Mechanical Components

Subscriptions4
  • Week$7.997 Days
  • Month$19.991 Month
  • 6 months$19.996 Months
Show 1 more
  • Year$29.991 Year

Questions

Is TopOpt 3D free?
TopOpt 3D is free to download, with no in-app purchases.
Is Mechanical Components free?
Mechanical Components is free to download, with in-app purchases available.
Which has better reviews, TopOpt 3D or Mechanical Components?
TopOpt 3D is rated higher. TopOpt 3D averages 3.7 out of 5 from 3 ratings, while Mechanical Components averages 3.0 from 2 ratings.
Do TopOpt 3D or Mechanical Components have ads?
Neither TopOpt 3D nor Mechanical Components shows ads.
Which is updated more often, TopOpt 3D or Mechanical Components?
TopOpt 3D ships an update every 6 weeks, and Mechanical Components every 7 months. Most recently, TopOpt 3D was updated on October 4, 2026 and Mechanical Components on October 2, 2026.

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