Comparison

Roadster Mk 2 for LEGO Bricks vs Physics Simulator Plus

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

Head to head
About

Roadster Mk 2 for LEGO Bricks

Create a custom Roadster using LEGO Creator sets 7347 and 31003 with detailed building instructions. This fan-made model features working steering, opening doors, and hood. Clear, step-by-step visuals and part lists guide your build.

Highlights
  • Custom Roadster build
  • Working steering
  • Opening scissor doors
  • Opening hood
  • Clear step-by-step instructions
  • LEGO parts list
  • Highlight new parts button
Features
Read full description

Build your own Roadster Mk 2 using LEGO® Creator sets 7347 and 31003! Turn your bricks into a detailed sports car with working steering, opening scissor doors, and an opening hood. Roadster Mk 2 is a fan-designed alternate model with clear, step-by-step building instructions that guide you through the entire construction process. Whether you're looking for a new way to use your existing LEGO bricks or enjoy building custom cars, this model offers a rewarding hands-on building experience. BUILD A ROADSTER WITH WORKING FEATURES Discover the details of this custom sports car: • Working steering mechanism • Opening scissor doors • Opening hood • Detailed body design EASY-TO-FOLLOW BUILDING INSTRUCTIONS The app includes everything you need to follow the construction process: • Large, clear pictures for every building step • Step-by-step instructions • Parts lists to help you identify the required pieces • Highlight New Parts feature to easily see what has changed between steps • Instructions designed for comfortable viewing on iPhone and iPad DESIGNED FOR LEGO CREATOR SETS Roadster Mk 2 is designed to be built using pieces from LEGO Creator sets 7347 and 31003. Give your existing bricks a new purpose and enjoy building a unique alternate model. PLEASE NOTE • This app provides building instructions for one Roadster Mk 2 model. It is not a construction game or a collection of multiple models. • Physical LEGO bricks are not included. • The app is free, with no ads and no in-app purchases. Roadster Mk 2 and its building instructions are independently created by LEGO fans. This is not an official LEGO product. LEGO® is a trademark of the LEGO Group of companies, which does not sponsor, authorize, or endorse this application.

About

Physics Simulator Plus

Features
Read full description

Physics Simulation is an easy-to-use tool for creating physics-animated illustrations. It allows anyone with a good understanding of math or physics to create animations and simulations effortlessly. It features a user-friendly control panel, making it perfect for casual users. Features: ∙ Easily create Free Fall or Collision simulations. ∙ Create, preview, and learn physics and math interactively. Project Management: ∙ Create and save physics simulations as projects. ∙ Edit or delete projects. ∙ Projects are transferable to other devices using the Files app. Simply go to Physics Simulator and copy the Project folder. Project Settings: ∙ Enable/disable Gravity (9.8 m/s²). ∙ Enable/disable Border Walls. ∙ Enable/disable Grid. ∙ Enable/disable Motion Arrows (for a better understanding of object motion direction). ∙ Enable/disable Mass Labels (for a quick review of object mass). ∙ Adjust Playback Speed (ranging from 0.1x to 3.0x for slow or fast simulation playback). Object Settings: ∙ In Edit Mode, touch and drag to reposition an object or double-tap to edit its properties. ∙ Add Balls or Rectangles. ∙ Edit or delete objects. ∙ Adjust Ball Size (10-100). ∙ Adjust Rectangle Size (10-100). ∙ Assign custom colors to objects. ∙ Set objects as Static or Dynamic. ∙ Adjust Object Mass (0-100 kg). Object Physics Properties: Is Dynamic – Indicates whether the object moves due to physics simulation. If false, the object remains static. Mass – Defines the object's weight in kilograms. Mass affects momentum and how forces interact with the object. Friction – Determines surface roughness and applies frictional force when objects collide (range: 0.0 - 1.0, default: 0.2). Restitution – Controls bounciness; determines how much energy is lost when an object bounces (range: 0.0 - 1.0, default: 0.2). Linear Damping – Reduces the object's linear velocity, simulating air or fluid resistance (range: 0.0 - 1.0, default: 0.1; 0.0 means no damping). Angular Damping – Reduces rotational velocity to simulate air or fluid friction (range: 0.0 - 1.0, default: 0.1; 0.0 means no damping). Velocity – The object's movement speed, measured in meters per second. Angular Velocity – The object's rotational speed, measured in radians per second. Quick Start Guide: 1. Tap the New File icon to start (this clears all objects). 2. Tap the Settings button. 3. Ensure Gravity and Walls are enabled, then tap Back. 4. Tap the Circle button, then tap the center of the screen to add a ball. 5. Tap the Edit button. 6. Double-tap the ball to open the Object Properties page. 7. Adjust the Size to 50. 8. Tap Back to see the updated ball size. 9. Tap the Play button to run the simulation. Tips: ∙ Use the Grid Overlay to align objects precisely. ∙ In Edit Mode, drag to reposition objects or double-tap to modify their properties. * Check out the Library for example projects. About Physics Simulation A physics simulation starts with a mathematical model where variables define the system's state at a given time. Each variable represents an object's position or velocity. The core of a physics simulation is a set of differential equations that determine how these variables evolve over time. Thanks for your support and do visit nitrio.com for more apps for your iOS devices.

Screenshots

Roadster Mk 2 for LEGO Bricks4 screens
Physics Simulator Plus4 screens

Verdict

The call

The clearest difference is price: Roadster Mk 2 for LEGO Bricks at Free against Physics Simulator Plus's $3.99. Roadster Mk 2 for LEGO Bricks also leads on update cadence (every 2 months vs every 25 months). Physics Simulator Plus's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement 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

Roadster Mk 2 for LEGO Bricks is free to download; Physics Simulator Plus costs $3.99 up front. Roadster Mk 2 for LEGO Bricks sells 1 one-off in-app purchase. Physics Simulator Plus asks for nothing beyond the download.

UpkeepUpdate frequency

Roadster Mk 2 for LEGO Bricks ships an update every 2 months, Physics Simulator Plus every 25 months. The most recent releases landed on October 16, 2026 and October 18, 2026 respectively.

Scorecard3 real differences · 7 level
Roadster Mk 2 for LEGO Bricks versus Physics Simulator Plus: the parameters behind the verdict, then further details
ParameterRoadster Mk 2 for LEGO BricksPhysics Simulator Plus
PriceFree — better$3.99
Rating3.9 (352 ratings) — better—
Positive reviews52.9% of reviews—
Number of ratings352 — better—
Update frequencyEvery 2 months — betterEvery 25 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size39 MB1 MB
Age rating4+4+
DeveloperSergey SlobodenyukHeng Jia Liang

Bugs and requests

Roadster Mk 2 for LEGO Bricks

Requested features

2 requests
  • More car models
  • Different pictures to build

Physics Simulator Plus

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Roadster Mk 2 for LEGO Bricks

One-time1
  • Remove ads$0.99
None

Physics Simulator Plus

No in-app purchases

Questions

Is Roadster Mk 2 for LEGO Bricks free?
Roadster Mk 2 for LEGO Bricks is free to download, with in-app purchases available.
Is Physics Simulator Plus free?
Physics Simulator Plus costs $3.99, with no in-app purchases.
Do Roadster Mk 2 for LEGO Bricks or Physics Simulator Plus have ads?
Neither Roadster Mk 2 for LEGO Bricks nor Physics Simulator Plus shows ads.
Which is updated more often, Roadster Mk 2 for LEGO Bricks or Physics Simulator Plus?
Roadster Mk 2 for LEGO Bricks ships an update every 2 months, and Physics Simulator Plus every 25 months. Most recently, Roadster Mk 2 for LEGO Bricks was updated on October 16, 2026 and Physics Simulator Plus on October 18, 2026.

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