Get Started
Harp is being developed in Compose Multiplatform and will be available across platforms. But for the initial releases, it's available for Android only since that's my primary OS.
Info
Use this issue tracker for reporting bugs, raising feature requests, and any other feedback.
Android
For Android, Harp is available on FDroid for free here. It will also be later available on Play Store at a charge to support the development.
You can also build the application from the source here and install manually.
Desktop
On desktop, the recommended way to work with Harp Org files is to use Emacs.
While doing so you might find it helpful to use a few utilities that make working with harp files easier. These are under development but can be found here.
Web
The multiplatform application should ideally compile to web at some point of time but not all features of Kotlin are available in that system, making this more effort at this point of time.
In the meantime, you might want to check out a deprecated web version written in Svelte here.
iOS
While the mobile multiplatform application should build and work directly in iOS too, I have not yet attempted a build and published yet. This stays a future task.