# BUTURAKU - Physics Simulator — Feel the beauty of physics > Feel the beauty of physics (iPhone/iPad app by Fuji Bit Inc..) - Source: https://appshunter.io/ios/app/buturaku-physics-simulator/id6759213255 (this page in markdown: same URL + `.md`) - Developer: [Fuji Bit Inc.](https://appshunter.io/developer/1874205957) - Category: Education, Entertainment - Price: Free - Age rating: 4+ - Requires: iOS 15.0 · 27 MB - Languages: American English, Afrikaans, Albanian, Amharic, Arabic, Armenian, Azerbaijani, Basque, Belarusian, Bangla and 63 more - Released: 2026-02-24 - Data updated: 2026-11-09 ## What is BUTURAKU? BUTURAKU is a physics simulation app that lets you explore physical phenomena through real-time animations. Understand physics laws intuitively with beautiful visuals. Freely adjust parameters with sliders and observe how physical phenomena change in real time. 14 Simulations: > Translational motion - Free Fall: Observe the effects of gravity and air resistance. Tap to add balls, swipe to throw them. - Projectile: Adjust launch angle, initial speed, and air resistance to observe parabolic motion. - Inclined Plane: Motion on a surface with friction. Experience sliding conditions by changing angle and friction coefficient. - Brachistochrone: Race three balls down line, arc, and cycloid tracks under gravity. Bernoulli's classic 1696 problem - the cycloid wins. - Rolling Race: A box, a sphere, a cylinder and a ring race down the same slope. Their moment of inertia decides the order - mass and size do not. See how kinetic energy splits between translation and rotation. - Energy Conservation: A ball rolls along a roller-coaster track while kinetic and potential energy swap places. Turn on friction to see mechanical energy dissipate into heat. - Collision: 2D collisions based on conservation of momentum and kinetic energy. Momentum vector display available. > Oscillation and periodic motion - Pendulum: Nonlinear pendulum with high-precision RK4 integration. Drag to set the angle. - Double Pendulum: Coupled pendulums producing chaotic motion. Lagrangian mechanics + RK4. - Coupled Pendulum: Two pendulums joined by a spring exchange energy periodically - the classic beat phenomenon. - Spring: Simple harmonic motion with Hooke's law. Adjust spring constant, damping, and mass. - Circular Motion: Uniform circular motion with centripetal force visualization (F = mω²r). Adjust radius, angular velocity, and mass. - Planetary Orbit: A planet circles a star under universal gravitation. Change the launch speed for circular, elliptical or escape orbits. Color-coded sectors show Kepler's second law - equal areas in equal times. Tap to place the planet anywhere. > Waves - Wave: Tap to place wave sources and observe interference patterns. 2D wave equation solved numerically with finite differences. Features: - Real-time physics simulation - Intuitive touch controls - Freely adjustable parameters via sliders - Physics explanations for each simulation - Dark / Light theme support - Available in 74 languages ## Is BUTURAKU safe? Not enough ratings yet to assess BUTURAKU. ## Is BUTURAKU legit? BUTURAKU - Physics Simulator appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for BUTURAKU is 65 out of 100 points across 7 verification signals from App Store and developer data. ## Version history (last 5 releases) ### 6.0 — 2026-11-07 - A completely redesigned look. Filter the home screen by category; play, reset and show/hide parameters now sit together at the bottom of every simulation. - Two new simulations: Planetary Orbit and Rolling Race. - Now available in 74 languages. ### 5.2 — 2026-06-05 - Added an About dialog showing the version and copyright. - Added a copyright line at the bottom of the home screen. - Tightened home-screen card padding for stable layout on narrow displays. ### 5.1 — 2026-05-23 - Added an About dialog showing the version and copyright. - Added a copyright line at the bottom of the home screen. - Tightened home-screen card padding for stable layout on narrow displays. ### 5.0 — 2026-05-22 - Two new simulations added: Coupled Pendulum (two pendulums joined by a spring - the classic beat phenomenon) and Conservation of Mechanical Energy (a roller-coaster track with real-time KE/PE/heat bars). - Home screen redesigned into category-based horizontal carousels (Translational / Oscillation / Waves). ### 4.1 — 2026-04-27 We have fixed the bug. ## Apps similar to BUTURAKU | App | Rating | Price | Category | | --- | --- | --- | --- | | [Foldly: Origami for Kids](https://appshunter.io/ios/app/foldly-origami-for-kids/id6814659381) | — | Free | Education | | [PhysicsLens +](https://appshunter.io/ios/app/physicslens-plus/id6780353475) | — | Free | Education | | [Unit Gacha !](https://appshunter.io/ios/app/unit-gacha/id6756411322) | — | Free | Education | | [Pendulum Lab](https://appshunter.io/ios/app/pendulum-lab/id6661026555) | — | $0.99 | Education | | [The Periodic Table - Chemistry](https://appshunter.io/ios/app/the-periodic-table-chemistry/id1257985734) | — | $1.99 | Education | | [アニメと実験で学ぶ高校物理](https://appshunter.io/ios/app/id6748957698) | — | Free | Education | ## More apps by Fuji Bit Inc. - [RENGOKU: Time Attack Pachinko](https://appshunter.io/ios/app/rengoku-time-attack-pachinko/id6758652751) - [SUUGAKU - Enjoy Numbers](https://appshunter.io/ios/app/suugaku-enjoy-numbers/id6759102221) - [DENRAKU - Electromagnetism Sim](https://appshunter.io/ios/app/denraku-electromagnetism-sim/id6759393816) - [PAKEDOU](https://appshunter.io/ios/app/pakedou/id6759820254) - [OKURERUNA！](https://appshunter.io/ios/app/okureruna/id6759956971) All apps by Fuji Bit Inc.: https://appshunter.io/developer/1874205957 ## Related topics [wuling](https://appshunter.io/ios/topics/wuling) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-09.*