Trees and done marks stay in this browser on this device. No login, no sync, no ads. Export JSON to keep a copy.
Draw a skill tree of tasks. Each task unlocks when its prerequisites are done — all of them (AND) or any one (OR). Share the JSON; every learner checks off their own copy. Free, offline, no account.
Skillpad turns tasks into a skill tree: drop nodes on a canvas and draw arrows from each prerequisite to the task it opens. Pick AND (all prerequisites done) or OR (any one is enough) per node. Locked tasks stay visible and say what they are waiting on.
It runs in the browser with no account, and trees and done marks stay in this browser on this device. Export a tree as JSON and the done marks are cleared, so whoever imports it gets their own curriculum to work through.
Guitar example: connect the C, G and Am chords to F with AND, and F opens the moment all three are ticked.