Ah yes I did reply to the wrong comment. And support is kind of universal but not deeply integrated in apps. Nextcloud adds itself as a location to the iOS Files app so anything that has the ability to save to Files can save to Nextcloud.
The problem is this is more of an import/export workflow rather than seamless syncing. I use it a lot while drawing, the files are all stored internally to the app but when I’m done I save the result to Nextcloud.
It would be nice to have apps automatically save everything there but I think Apple wants to avoid having these remote storage setups as primary storage so your device is still usable with no network connection.
The problem is this is more of an import/export workflow rather than seamless syncing. I use it a lot while drawing, the files are all stored internally to the app but when I’m done I save the result to Nextcloud.
It would be nice to have apps automatically save everything there but I think Apple wants to avoid having these remote storage setups as primary storage so your device is still usable with no network connection.