CodeMate is a native Mac app for DSA and system-design prep — real test-case grading, an on-device AI assistant, a whiteboard for LLD/HLD, and a guided path so you always know what's next.
macOS 14+ · Apple Silicon
Not a browser tab pretending to be a code editor — an actual macOS app, with the on-device intelligence and native polish that implies.
Run doesn't just mean "did it compile." Every problem with a test harness grades your submission against structured inputs and expected outputs, per test — pass 2 of 3 and you'll see exactly which one failed and why.
LLD/HLD questions come with a real drawing surface next to the assistant — sketch the architecture, boxes and arrows, before you write a line of code.
Streaks, a GitHub-style activity graph, and a breakdown by difficulty, company, and topic — so progress is something you can see, not just something you hope is happening.
The Roadmap tab orders every topic into 15 stages — the same curriculum shape as well-known DSA courses — with a "pick up here" button that always knows what you should solve next.
Typing a solution, hitting Run, and watching real tests pass — no cuts.
Free to try, no card needed. Upgrade from inside the app once you know it's worth it.
Notarized, no Gatekeeper warning, no account required to start.