See structures. Understand them.
An educational visualization app that lets you UNDERSTAND data structures by watching them — not by reading. Abstract concepts like stacks, queues, trees, and hash tables come alive as animations where the structure itself deforms in response to your operations.
Pile, connect, arrange — the building blocks
LIFO — push and pop. Feel "last in, first out" through stacking motion.
FIFO — enqueue and dequeue. Watch the entry and exit ends of a queue.
Random access plus the shifting of elements on insert and delete.
Nodes joined by arrows. Insert and delete rewire the arrows.
Branch, climb, jump, connect
Values drop into place after branching left or right by comparison.
Complete binary tree with up-heap and down-heap motion.
Keys travel through a hash function and land in a bucket.
Nodes and edges showing adjacency. Walk an undirected graph with BFS.
Every decision puts the learning experience first
Visualizations are sacred. Banners appear only on structure-selection and explanation screens, never on top of an animation.
Inserts, moves, and deletes always animate as a smooth deformation so you can see what is happening.
Complexity (access / search / insert / delete), pros and cons, and real-world usage — all in one tap.
Same experience across iOS and Android. Dark color palette designed to be easy on the eyes.
Automatically switches to match your device language. Built for learners worldwide.
Every feature unlocked from day one. No in-app purchases, no subscriptions, no paywalls.
The second information-systems title of the Raku Series, sibling to ARURAKU (algorithm visualization). Cross-links between the two apps let you learn the "motion of computation" and the "structures that carry it" side by side.
Students learning programming for the first time / Anyone preparing for an IT certification / Engineers who want to re-grasp data structures visually / Curious minds who love watching things move