Callisto: Jupyter & Python IDE

Callisto is a Jupyter Notebook editor and Python IDE for Android. Open .ipynb files, edit cells, run Python code, see output — fully on-device, no cloud account, no internet required. Or connect to your own Jupyter server when you need more than a phone. Built for data scientists, students, and ML/AI practitioners who want a real Python environment in their pocket. JUPYTER NOTEBOOKS • Open and edit .ipynb files (v4 format) • Create new notebooks from scratch • Run cells individually, run below, or run all at once • Interrupt long-running cells without losing your session • Code cells with syntax highlighting (CodeMirror 6) • Markdown cells rendered with LaTeX math support (KaTeX) • Cell operations: insert, delete, duplicate, move, change type PYTHON SCRIPTS • Edit and run .py files with the same editor and output pipeline • Unified file library for notebooks and scripts, with recents INTERACTIVE PYTHON CONSOLE • Built-in REPL sharing the interpreter with your open file • Variables and imports flow both ways between console and notebook • 200-entry persistent input history • input() and getpass() are answered right in the app SMART CODE COMPLETION • Jedi-powered autocomplete against your live Python namespace • df. resolves to actual DataFrame methods — not static stubs • Signature hints and inline documentation panel REAL PYTHON, FULLY OFFLINE • CPython 3.10 runs entirely on-device — no server, no Wi-Fi needed • Bundled free tier: numpy, matplotlib, Pillow • "Open with…" — set Callisto as your default .ipynb and .py handler PRO — FULL SCIENCE BUNDLE + REMOTE SERVERS One-time purchase. No subscription, no recurring fees. Unlock the complete curated package set and extra features: • pandas, scikit-learn, scipy, statsmodels, seaborn, sympy, openpyxl, beautifulsoup4, requests • remote servers: run your notebooks on any Jupyter server — a desktop on your network, a rented cloud GPU, or Termux on this device • runs keep going when your connection drops • browse server files, upload and download, pick a working folder, open notebooks straight from remote • coding keyboard with quick access to the most used programming symbols MORE • Dark and light themes with multiple accent colors • Per-file workspace: output files, data files, ZIP bundle export • Plot output with pinch-to-zoom • Privacy-first: no ads, analytics opt-in only