A real IPython kernel (CPython 3.13) runs inside the app — no server, no pip. NumPy, pandas, SciPy, scikit-learn, matplotlib & 45+ packages preinstalled; standard .ipynb files open on phone and laptop alike. Optional AI (bring your own key) works inside the notebook: drafts code, runs it only when you allow, and plots results as interactive ECharts. Hide or lock cells to keep them from the AI. Offline. No account, no telemetry. $4.99 one-time.