Installing Orion
Apple Devices
You can download an installer for Orion for macOS and read its latest release notes.
You can install Orion for iOS/iPadOS from the App Store and read its latest release notes.
You can also scan the QR code below to download Orion on your iPhone or iPad: 
Orion is free, and no account or signup is required to use it.
Linux
The open beta version of Orion for Linux is currently available to everyone. The most recent build can be downloaded from Orion's website.
Note
This version is intended for testing and reporting bugs in the Orion Feedback Forum.
While each version is a significant leap forward, some features may still be missing, so depending on your use case, Orion might not yet be ready for everyday use.
Installation
You can find instructions for installing and using Flatpak for your distro here.
After you've set up Flatpak, you can install Orion using the flatpak install command:
flatpak install /path/to/App.flatpak(Replace /path/to/App.flatpak with your downloaded file path)