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Juno lets you work with standalone Python scripts, entire folders opened as projects, and interactive REPL sessions in one native workspace. Code runs locally on your iPad or iPhone using Juno’s built-in Python 3.13 environment, even when you’re offline.

Juno lets you work on Jupyter notebooks with much more than just a code editor: it creates an entire notebook workspace, where everything you may need is within easy reach. It provides a powerful and customizable notebook editor designed for iPad and iPhone, allowing you to seamlessly navigate, view, and edit files in the working directory without leaving your notebook.

Juno allows you to browse and manage your files and folders similarly to how you would with the Files app. Additionally, it provides the ability to add quick access bookmarks to file system locations, and to quickly view documents and media—including beautifully rendered Jupyter notebook previews, and rich previews for code sources, scripts, JSON, XML, and other text-based formats with syntax highlighting.

Whether you are working on a Jupyter notebook or a Python script, Juno offers much more than just a code editor: it creates an entire workspace, where everything you may need is within easy reach. One of these things is access to the file system—and Juno lets you seamlessly navigate, view, and edit files in the working directory without leaving your document.

Juno ships with many powerful libraries already pre-installed, such as SciPy, NumPy, pandas and Scikit-learn—but you can also install additional pure-Python packages with Juno’s package manager. It looks up packages on PyPI (Python Package Index), works out all package dependencies, shows you the whole plan before anything is installed, and then installs the set. It also keeps track of what is on your device, points out available updates, and can set up a whole project by installing the packages its requirements file lists.

Although Juno makes coding on the iPad a breeze, there are still some tricks you need to know—one of them is working with the file system and handling paths. For example, when your code needs to read a file’s contents or write data to a file, how do you specify the file’s location in iOS?

Juno is a native Python development environment in a first-class citizen app for iPad and iPhone. Juno lets you work with both plain Python scripts and Jupyter notebooks, a commonly used document format, which lets you combine source code, code output, text, formulas and rich media. Juno ships with its own Python interpreter, which executes scripts and notebooks locally on your device, bringing a lot of industry standard desktop tools to iOS and iPadOS.

Juno Connect lets you use your Jupyter server remotely on your iPad or iPhone by either connecting directly (via HTTP/HTTPS), or by establishing a secure SSH tunnel and using SSH port forwarding. Follow these steps to connect to your server via SSH tunneling.

Juno Connect lets you use your Jupyter server remotely on your iPad or iPhone by either connecting directly (via HTTP/HTTPS), or by establishing a secure SSH tunnel and using SSH port forwarding. Follow these steps to connect to your server directly, without SSH tunneling.

In order to access a Jupyter server over HTTPS on your iPad or iPhone (in both Juno Connect and Safari), one needs to correctly configure server’s SSL/TLS certificate. Since issuing a proper certificate from a trusted authority could be challenging in some cases, a self-signed certificate should suffice, provided it was signed by a CA that is trusted by your iOS device.