NETURAKU vs Origami Learn

NETURAKU is an interactive educational simulation app for experiencing thermodynamics phenomena hands-on. The 5th app in the RAKU series following SUUGAKU (math), BUTURAKU (physics), DENRAKU (electricity), and HARAKU (waves). This time, the theme is heat. Learn and enjoy the wonders of heat and the depth of physical laws through 10 simulations. [10 Simulations] 1. Particle Motion (Ideal Gas) Observe particle motion in real time based on temperature. Change volume and temperature to measure pressure from wall collisions and experience the ideal gas law (PV = nRT). 2. Heat Conduction Simulate heat diffusion using a 2D finite difference method. Adjust heat source temperatures and thermal conductivity to observe temperature distribution changes based on Fourier's law in real time. 3. Phase Transition Matter changes state between solid, liquid, and gas as temperature varies. Intuitively experience the differences in particle behavior from lattice vibrations to free motion. Visually understand the concepts of melting and boiling points. 4. Carnot Cycle Follow the 4 processes - isothermal expansion, adiabatic expansion, isothermal compression, and adiabatic compression - on a PV diagram. Visualize the efficiency of an ideal heat engine (eta = 1 - T_L/T_H). 5. Entropy Simulate the mixing process of two types of gas separated by a partition. When the partition is removed, observe entropy increasing in real time on a graph. 6. Thermal Radiation (Blackbody Radiation) Visualize the blackbody radiation spectrum (Planck distribution) in real time based on temperature. As temperature changes, the peak wavelength shifts (Wien's displacement law) and radiant energy is proportional to the fourth power of temperature (Stefan-Boltzmann law). 7. Speed Distribution (Maxwell-Boltzmann) View the speed distribution of gas particles as a histogram alongside the theoretical curve. As temperature rises, watch the distribution broaden and its peak shift to the right. Build intuition for the most probable, mean, and root-mean-square speeds. 8. Brownian Motion Visualize a large particle (pollen grain) undergoing irregular motion as it is buffeted by countless invisible smaller molecules. The path is drawn in real time, revealing the random-walk trajectory and how temperature and molecule count affect the motion. 9. Cooling Law (Newton's Law of Cooling) Simulate how a hot object cools at a rate proportional to its temperature difference with the surroundings. Adjust the cooling coefficient, initial temperature, and ambient temperature to watch the exponential decay curve on the temperature-time graph approach equilibrium. 10. Diffusion (Fick's Law) Simulate how a concentration imbalance, like a drop of ink, spreads from high to low until it becomes uniform. Tap to add ink and watch the center cross-section profile flatten (peak lowering and widening toward a uniform state). [Features] - Adjust parameters in real time across all simulations - Real-time display of physics formulas and numerical values - Dark mode / Light mode support - Clean home screen organized by category - Intuitive and beautiful UI - Only a banner ad at the bottom of the home screen - No in-app purchases or subscriptions [Recommended For] - Students studying thermodynamics or statistical mechanics in physics class - Anyone who wants to intuitively understand the properties of heat - Teachers looking for educational tools - Everyone interested in thermodynamics and statistical physics

Origami Learn is a folding simulator, not a picture book. Every one of the 959 steps in this app is real geometry. The paper on screen is a simulated sheet with layers and creases, so you can drag a fold half-way and hold it there, turn the sheet over to see which flap moves, and replay the same crease as many times as you like. Nothing here is a photograph or a video. That is why it can unstick you when a diagram in a book cannot. 148 MODELS, 122 FREE FOREVER 116 origami models, 9 modular pieces built from folded units, and 23 kirigami designs you fold and cut. Cranes, boxes, flowers, animals, insects, stars, snowflakes, and the traditional children's furniture set. Each one is a genuine traditional design, with the region it came from and the paper it wants. A COURSE, NOT A CATALOGUE Nine chapters take you from "what is a valley fold" to bird bases, reverse folds, modular units and open-and-pull. Twelve lessons and seven practice sets, each unlocking the models that use what you just learned. Search the whole path, switch to a chapter grid, or ask for just the next thing in each chapter. LEARN TO READ ORIGAMI BOOKS Beside the live paper, every step is also drawn the way an origami book draws it: the standard symbols, dashed valley and dash-dot mountain creases, and fold arrows anchored to the corner that actually travels. Learn these and the rest of origami literature opens up. BRING IT TO LIFE Finish a model and decorate it. Thirty-six vector stickers — eyes, mouths, whiskers, leaves, stars — in any colour, plus freehand drawing. Print it, share it as a picture, or keep it in your gallery. Twenty models can be set moving and saved as a looping GIF: the flapping bird flaps, the frog jumps, the tulip opens. FOLD WITH YOUR HANDS FULL Say "next", "back" or "again". Speech is recognised entirely on your device and no audio ever leaves it. Or let the app read each step aloud while you keep both hands on the paper. IPHONE, IPAD, MAC AND APPLE WATCH One purchase covers all four. On Apple Watch the Digital Crown becomes a fold scrubber: rotate to close the crease, feel a tap when it lands, and the step moves on by itself. Add a complication and the watch face puts you back at the step you left. Progress follows you between wrist, phone, tablet and desk. MAKE IT YOUR PAPER Choose the colour of both sides of the sheet, per model or everywhere, including a colour-blind-safe pair told apart by lightness rather than hue. Print true-size squares and grids from Paper Tools. Design your own snowflake in Snowflake Studio and watch the cuts mirror around the wedge. BUILT TO BE READ Full VoiceOver in the player, Dynamic Type throughout, Reduce Motion that swaps animation for clear before-and-after states, AA contrast, and Kids Mode that hides anything needing scissors. FIVE LANGUAGES, COMPLETELY English, Tiếng Việt, 日本語, Español and 简体中文 — not only the buttons, but every model name, every step instruction, every tip, lesson and glossary entry. Switch language in Settings and the whole app reloads in it. NO ADS. NO TRACKING. NO ACCOUNT. There is nothing to sign up for and nothing to collect. No analytics, no advertising, no third-party SDKs. Your progress and your photographs stay on your device, and the whole library works offline. Home: https://orlproducts.com/origamilearn.html Privacy Policy: https://orlproducts.com/privacy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Got ideas or feedback? Send them our way: info@orlproducts.com