Juno

Spec sheet

What it does

Juno is a native Python development environment for iPad and iPhone that runs Python scripts and Jupyter notebooks locally on the device.Read 5 Oct 2026 · juno.sh

Support

The FAQ directs users to documentation, the GitHub issue tracker or email for help.Read 5 Oct 2026 · juno.sh

Headquarters

London, United KingdomRead 28 Sep 2026 · juno.sh

AI assistant

The optional AI coding assistant can answer questions, generate code and apply reviewed changes across notebooks, scripts and projects.Read 5 Oct 2026 · juno.sh

AI providers

The AI assistant uses the user’s own API key and sends requests directly from the device to OpenAI, Anthropic or Google Gemini.Read 5 Oct 2026 · juno.sh

Git workflow

Juno works with third-party git clients such as Working Copy by editing repository files in place through iOS file system access.Read 5 Oct 2026 · juno.sh

iOS integration

Juno integrates with Apple Files and supports Dark Mode, Dynamic Type, split screen, multiple windows and Magic Keyboard and trackpad.Read 5 Oct 2026 · juno.sh

Known limits

Juno does not support multiple environments or arbitrary notebook extensions, and cannot install another Jupyter kernel.Read 5 Oct 2026 · juno.sh

Libraries

Juno includes over 130 pre-installed Python packages, including NumPy, SciPy, pandas, Scikit-learn, Polars and DuckDB.Read 5 Oct 2026 · juno.sh

Maker and location

The privacy policy identifies Rational Matter Ltd as the controller and lists its address as 71–75 Shelton Street, London WC2H 9JQ, United Kingdom.Read 5 Oct 2026 · juno.sh

Notebooks and projects

Juno supports Jupyter notebooks, standalone Python scripts, project folders and interactive REPL sessions.Read 5 Oct 2026 · juno.sh

Offline use

Local development works offline using Juno’s built-in Python 3.13 interpreter.Read 5 Oct 2026 · juno.sh

Package installation

Its package manager installs most pure-Python packages from PyPI, but packages that depend on compiled extensions may not be installable unless bundled with the app.Read 5 Oct 2026 · juno.sh

Security and privacy

Juno stores workspace data locally, does not provide accounts or cloud storage, and does not itself upload notebooks, scripts or projects to Rational Matter.Read 5 Oct 2026 · juno.sh

Telemetry

The standard edition sends product usage events to TelemetryDeck and Firebase Analytics and uses Firebase Crashlytics for crash reports.Read 5 Oct 2026 · juno.sh

Plans and prices

Every Juno plan and price →

Where Specifiction places it

• Python IDEs#10 of 267.8