Smoldor Echo

Smoldor Echo is a hands-on graph algorithm playground for students, developers, and anyone who wants to truly understand how classic computer science algorithms work — not just read about them, but watch them move. Tap the canvas to place nodes. Drag between nodes to draw weighted edges. Flip between directed and undirected mode with a single tap. Then choose one of eight fundamental algorithms — BFS, DFS, Dijkstra, A*, Kruskal, Prim, Topological Sort, or Graph Colouring — and watch it run one step at a time, with every frontier node, relaxed edge, and visited path highlighted as it happens. Plain-English captions explain what the algorithm is doing at each moment so nothing is left as a black box. A scrubbable timeline lets you step forward, step backward, pause, and replay at your own pace. An interactive algorithm guide covers time complexity, directed and undirected requirements, and a live animated demo for each of the eight methods. Your run history is saved and displayed as a radial chart so you can track which algorithms you have explored most. Everything runs fully on-device. No account required, no network connection, no ads. Build a graph, run an algorithm, understand it.