Frequently asked questions
Yes — the roadmap, visualizers, problem bank and cheatsheets are completely free, and you can trace your own code as much as you like with no run cap. Pro is for the extras: AI explanations and deeper study tools.
JavaScript and Python are instrumented at the statement level, giving true line-by-line traces. Go and C++ are traced with a static parser that reports variable and call-stack state at each step.
Roadmap and practice progress live in your browser's localStorage — no account needed. Accounts are only required for tracing limits and AI features.
AlgoViz is a companion, not a replacement. Use it to understand the algorithm behind a problem, then solve the problem on LeetCode with the pattern locked in.
Email hello@algoviz.app or open an issue on the project repository — algorithm requests are triaged weekly.