With ''other apps'' you mean Nostr apps? If so, i think you have been sleeping on kind21 (and kind 20 for that matter) adoption among the various clients
They have no url that can be viewed in other apps, this comes from chunked & encrypted blossom-like hashtree-ts https://files.iris.to/#/npub1xndmdgymsf4a34rzr7346vp8qcptxf75pjqweh8naa8rklgxpfqqmfjtce/hashtree-ts
With ''other apps'' you mean Nostr apps? If so, i think you have been sleeping on kind21 (and kind 20 for that matter) adoption among the various clients
