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